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linux/include/asm-generic/atomic.h

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asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
atomic: Update comments in atomic.h This clarifies the differences between <linux/atomic.h> and <asm-generic/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Suggested-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:08 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h as all arch files that #include the former also #include the latter. See: grep -rl asm-generic/cmpxchg-local[.]h arch/ | sort > b grep -rl asm-generic/cmpxchg[.]h arch/ | sort > a comm a b This simplifies the disintegration of asm-generic/system.h for arches that don't have their own. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-28 18:30:03 +01:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic: don't warn that atomic_t is only 24 bit 32-bit Sparc used to only allow usage of 24-bit of it's atomic_t type. This was corrected with linux 2.6.3 when Keith M Wesolowski changed the implementation to use the parisc approach of having an array of spinlocks to protect the atomic_t. These warnings were also removed from the sparc implementation when the new implementation was merged in BKrev:402e4949VThdc6D3iaosSFUgabMfvw, but the warning still remained in some other places without any 24-bit-only atomic_t implementation inside the kernel. We should remove these warnings to allow users to rely on the full 32-bit range of atomic_t. Signed-off-by: Peter Fritzsche <peter.fritzsche@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-24 14:33:09 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
atomic_t: Cast to volatile when accessing atomic variables In preparation for removing volatile from the atomic_t definition, this patch adds a volatile cast to all the atomic read functions. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-17 14:33:53 +10:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic: don't warn that atomic_t is only 24 bit 32-bit Sparc used to only allow usage of 24-bit of it's atomic_t type. This was corrected with linux 2.6.3 when Keith M Wesolowski changed the implementation to use the parisc approach of having an array of spinlocks to protect the atomic_t. These warnings were also removed from the sparc implementation when the new implementation was merged in BKrev:402e4949VThdc6D3iaosSFUgabMfvw, but the warning still remained in some other places without any 24-bit-only atomic_t implementation inside the kernel. We should remove these warnings to allow users to rely on the full 32-bit range of atomic_t. Signed-off-by: Peter Fritzsche <peter.fritzsche@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-24 14:33:09 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
Fix IRQ flag handling naming Fix the IRQ flag handling naming. In linux/irqflags.h under one configuration, it maps: local_irq_enable() -> raw_local_irq_enable() local_irq_disable() -> raw_local_irq_disable() local_irq_save() -> raw_local_irq_save() ... and under the other configuration, it maps: raw_local_irq_enable() -> local_irq_enable() raw_local_irq_disable() -> local_irq_disable() raw_local_irq_save() -> local_irq_save() ... This is quite confusing. There should be one set of names expected of the arch, and this should be wrapped to give another set of names that are expected by users of this facility. Change this to have the arch provide: flags = arch_local_save_flags() flags = arch_local_irq_save() arch_local_irq_restore(flags) arch_local_irq_disable() arch_local_irq_enable() arch_irqs_disabled_flags(flags) arch_irqs_disabled() arch_safe_halt() Then linux/irqflags.h wraps these to provide: raw_local_save_flags(flags) raw_local_irq_save(flags) raw_local_irq_restore(flags) raw_local_irq_disable() raw_local_irq_enable() raw_irqs_disabled_flags(flags) raw_irqs_disabled() raw_safe_halt() with type checking on the flags 'arguments', and then wraps those to provide: local_save_flags(flags) local_irq_save(flags) local_irq_restore(flags) local_irq_disable() local_irq_enable() irqs_disabled_flags(flags) irqs_disabled() safe_halt() with tracing included if enabled. The arch functions can now all be inline functions rather than some of them having to be macros. Signed-off-by: David Howells <dhowells@redhat.com> [X86, FRV, MN10300] Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [Tile] Signed-off-by: Michal Simek <monstr@monstr.eu> [Microblaze] Tested-by: Catalin Marinas <catalin.marinas@arm.com> [ARM] Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> [AVR] Acked-by: Tony Luck <tony.luck@intel.com> [IA-64] Acked-by: Hirokazu Takata <takata@linux-m32r.org> [M32R] Acked-by: Greg Ungerer <gerg@uclinux.org> [M68K/M68KNOMMU] Acked-by: Ralf Baechle <ralf@linux-mips.org> [MIPS] Acked-by: Kyle McMartin <kyle@mcmartin.ca> [PA-RISC] Acked-by: Paul Mackerras <paulus@samba.org> [PowerPC] Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [S390] Acked-by: Chen Liqin <liqin.chen@sunplusct.com> [Score] Acked-by: Matt Fleming <matt@console-pimps.org> [SH] Acked-by: David S. Miller <davem@davemloft.net> [Sparc] Acked-by: Chris Zankel <chris@zankel.net> [Xtensa] Reviewed-by: Richard Henderson <rth@twiddle.net> [Alpha] Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> [H8300] Cc: starvik@axis.com [CRIS] Cc: jesper.nilsson@axis.com [CRIS] Cc: linux-cris-kernel@axis.com
2010-10-07 14:08:55 +01:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
Fix IRQ flag handling naming Fix the IRQ flag handling naming. In linux/irqflags.h under one configuration, it maps: local_irq_enable() -> raw_local_irq_enable() local_irq_disable() -> raw_local_irq_disable() local_irq_save() -> raw_local_irq_save() ... and under the other configuration, it maps: raw_local_irq_enable() -> local_irq_enable() raw_local_irq_disable() -> local_irq_disable() raw_local_irq_save() -> local_irq_save() ... This is quite confusing. There should be one set of names expected of the arch, and this should be wrapped to give another set of names that are expected by users of this facility. Change this to have the arch provide: flags = arch_local_save_flags() flags = arch_local_irq_save() arch_local_irq_restore(flags) arch_local_irq_disable() arch_local_irq_enable() arch_irqs_disabled_flags(flags) arch_irqs_disabled() arch_safe_halt() Then linux/irqflags.h wraps these to provide: raw_local_save_flags(flags) raw_local_irq_save(flags) raw_local_irq_restore(flags) raw_local_irq_disable() raw_local_irq_enable() raw_irqs_disabled_flags(flags) raw_irqs_disabled() raw_safe_halt() with type checking on the flags 'arguments', and then wraps those to provide: local_save_flags(flags) local_irq_save(flags) local_irq_restore(flags) local_irq_disable() local_irq_enable() irqs_disabled_flags(flags) irqs_disabled() safe_halt() with tracing included if enabled. The arch functions can now all be inline functions rather than some of them having to be macros. Signed-off-by: David Howells <dhowells@redhat.com> [X86, FRV, MN10300] Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [Tile] Signed-off-by: Michal Simek <monstr@monstr.eu> [Microblaze] Tested-by: Catalin Marinas <catalin.marinas@arm.com> [ARM] Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> [AVR] Acked-by: Tony Luck <tony.luck@intel.com> [IA-64] Acked-by: Hirokazu Takata <takata@linux-m32r.org> [M32R] Acked-by: Greg Ungerer <gerg@uclinux.org> [M68K/M68KNOMMU] Acked-by: Ralf Baechle <ralf@linux-mips.org> [MIPS] Acked-by: Kyle McMartin <kyle@mcmartin.ca> [PA-RISC] Acked-by: Paul Mackerras <paulus@samba.org> [PowerPC] Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [S390] Acked-by: Chen Liqin <liqin.chen@sunplusct.com> [Score] Acked-by: Matt Fleming <matt@console-pimps.org> [SH] Acked-by: David S. Miller <davem@davemloft.net> [Sparc] Acked-by: Chris Zankel <chris@zankel.net> [Xtensa] Reviewed-by: Richard Henderson <rth@twiddle.net> [Alpha] Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> [H8300] Cc: starvik@axis.com [CRIS] Cc: jesper.nilsson@axis.com [CRIS] Cc: linux-cris-kernel@axis.com
2010-10-07 14:08:55 +01:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic: use raw_local_irq_save/restore instead local_irq_save/restore The start/stop_critical_timing functions for preemptirqsoff, preemptoff and irqsoff tracers contain atomic_inc() and atomic_dec() operations. Atomic operations use local_irq_save/restore macros to ensure atomic access but they are traced by the same function which is causing recursion problem. The reason is when these tracers are turn ON then the local_irq_save/restore macros are changed in include/linux/irqflags.h to call trace_hardirqs_on/off which call start/stop_critical_timing. Microblaze was affected because it uses generic atomic implementation. Signed-off-by: Michal Simek <monstr@monstr.eu> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-09 17:18:24 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
Fix IRQ flag handling naming Fix the IRQ flag handling naming. In linux/irqflags.h under one configuration, it maps: local_irq_enable() -> raw_local_irq_enable() local_irq_disable() -> raw_local_irq_disable() local_irq_save() -> raw_local_irq_save() ... and under the other configuration, it maps: raw_local_irq_enable() -> local_irq_enable() raw_local_irq_disable() -> local_irq_disable() raw_local_irq_save() -> local_irq_save() ... This is quite confusing. There should be one set of names expected of the arch, and this should be wrapped to give another set of names that are expected by users of this facility. Change this to have the arch provide: flags = arch_local_save_flags() flags = arch_local_irq_save() arch_local_irq_restore(flags) arch_local_irq_disable() arch_local_irq_enable() arch_irqs_disabled_flags(flags) arch_irqs_disabled() arch_safe_halt() Then linux/irqflags.h wraps these to provide: raw_local_save_flags(flags) raw_local_irq_save(flags) raw_local_irq_restore(flags) raw_local_irq_disable() raw_local_irq_enable() raw_irqs_disabled_flags(flags) raw_irqs_disabled() raw_safe_halt() with type checking on the flags 'arguments', and then wraps those to provide: local_save_flags(flags) local_irq_save(flags) local_irq_restore(flags) local_irq_disable() local_irq_enable() irqs_disabled_flags(flags) irqs_disabled() safe_halt() with tracing included if enabled. The arch functions can now all be inline functions rather than some of them having to be macros. Signed-off-by: David Howells <dhowells@redhat.com> [X86, FRV, MN10300] Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [Tile] Signed-off-by: Michal Simek <monstr@monstr.eu> [Microblaze] Tested-by: Catalin Marinas <catalin.marinas@arm.com> [ARM] Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> [AVR] Acked-by: Tony Luck <tony.luck@intel.com> [IA-64] Acked-by: Hirokazu Takata <takata@linux-m32r.org> [M32R] Acked-by: Greg Ungerer <gerg@uclinux.org> [M68K/M68KNOMMU] Acked-by: Ralf Baechle <ralf@linux-mips.org> [MIPS] Acked-by: Kyle McMartin <kyle@mcmartin.ca> [PA-RISC] Acked-by: Paul Mackerras <paulus@samba.org> [PowerPC] Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [S390] Acked-by: Chen Liqin <liqin.chen@sunplusct.com> [Score] Acked-by: Matt Fleming <matt@console-pimps.org> [SH] Acked-by: David S. Miller <davem@davemloft.net> [Sparc] Acked-by: Chris Zankel <chris@zankel.net> [Xtensa] Reviewed-by: Richard Henderson <rth@twiddle.net> [Alpha] Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> [H8300] Cc: starvik@axis.com [CRIS] Cc: jesper.nilsson@axis.com [CRIS] Cc: linux-cris-kernel@axis.com
2010-10-07 14:08:55 +01:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic: use raw_local_irq_save/restore instead local_irq_save/restore The start/stop_critical_timing functions for preemptirqsoff, preemptoff and irqsoff tracers contain atomic_inc() and atomic_dec() operations. Atomic operations use local_irq_save/restore macros to ensure atomic access but they are traced by the same function which is causing recursion problem. The reason is when these tracers are turn ON then the local_irq_save/restore macros are changed in include/linux/irqflags.h to call trace_hardirqs_on/off which call start/stop_critical_timing. Microblaze was affected because it uses generic atomic implementation. Signed-off-by: Michal Simek <monstr@monstr.eu> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-09 17:18:24 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: simplify inc/dec test helpers We already declared inc/dec helpers, so we don't need to call the atomic_{add,sub}_return funcs directly. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:09 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic: make atomic_add_unless a function atomic_add_unless is a macro so, bad things happen if the caller defines a local variable named c, just like like the local variable c defined by the macro. Thus, convert atomic_add_unless to a function. (bug triggered by net/ipv4/netfilter/ipt_CLUSTERIP.c: clusterip_config_find_get calls atomic_inc_not_zero) Signed-off-by: Mathieu Lacage <mathieu.lacage@inria.fr> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2010-06-27 12:26:06 +02:00
atomic: move atomic_add_unless to generic code This is in preparation for more generic atomic primitives based on __atomic_add_unless. Signed-off-by: Arun Sharma <asharma@fb.com> Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:07 -07:00
asm-generic: make atomic_add_unless a function atomic_add_unless is a macro so, bad things happen if the caller defines a local variable named c, just like like the local variable c defined by the macro. Thus, convert atomic_add_unless to a function. (bug triggered by net/ipv4/netfilter/ipt_CLUSTERIP.c: clusterip_config_find_get calls atomic_inc_not_zero) Signed-off-by: Mathieu Lacage <mathieu.lacage@inria.fr> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2010-06-27 12:26:06 +02:00
atomic: move atomic_add_unless to generic code This is in preparation for more generic atomic primitives based on __atomic_add_unless. Signed-off-by: Arun Sharma <asharma@fb.com> Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:07 -07:00
asm-generic: make atomic_add_unless a function atomic_add_unless is a macro so, bad things happen if the caller defines a local variable named c, just like like the local variable c defined by the macro. Thus, convert atomic_add_unless to a function. (bug triggered by net/ipv4/netfilter/ipt_CLUSTERIP.c: clusterip_config_find_get calls atomic_inc_not_zero) Signed-off-by: Mathieu Lacage <mathieu.lacage@inria.fr> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2010-06-27 12:26:06 +02:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: fix type used in atomic_clear_mask The atomic helpers are supposed to take an atomic_t pointer, not a random unsigned long pointer. So convert atomic_clear_mask over. While we're here, also add some nice documentation to the func. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:10 -07:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic/atomic.h: fix type used in atomic_clear_mask The atomic helpers are supposed to take an atomic_t pointer, not a random unsigned long pointer. So convert atomic_clear_mask over. While we're here, also add some nice documentation to the func. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:10 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic: use raw_local_irq_save/restore instead local_irq_save/restore The start/stop_critical_timing functions for preemptirqsoff, preemptoff and irqsoff tracers contain atomic_inc() and atomic_dec() operations. Atomic operations use local_irq_save/restore macros to ensure atomic access but they are traced by the same function which is causing recursion problem. The reason is when these tracers are turn ON then the local_irq_save/restore macros are changed in include/linux/irqflags.h to call trace_hardirqs_on/off which call start/stop_critical_timing. Microblaze was affected because it uses generic atomic implementation. Signed-off-by: Michal Simek <monstr@monstr.eu> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-09 17:18:24 -07:00
asm-generic/atomic.h: fix type used in atomic_clear_mask The atomic helpers are supposed to take an atomic_t pointer, not a random unsigned long pointer. So convert atomic_clear_mask over. While we're here, also add some nice documentation to the func. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:10 -07:00
asm-generic: use raw_local_irq_save/restore instead local_irq_save/restore The start/stop_critical_timing functions for preemptirqsoff, preemptoff and irqsoff tracers contain atomic_inc() and atomic_dec() operations. Atomic operations use local_irq_save/restore macros to ensure atomic access but they are traced by the same function which is causing recursion problem. The reason is when these tracers are turn ON then the local_irq_save/restore macros are changed in include/linux/irqflags.h to call trace_hardirqs_on/off which call start/stop_critical_timing. Microblaze was affected because it uses generic atomic implementation. Signed-off-by: Michal Simek <monstr@monstr.eu> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-09 17:18:24 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00
asm-generic/atomic.h: add atomic_set_mask() helper Since arches are expected to implement this guy, add a common version for people the same way as atomic_clear_mask is handled. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:10 -07:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic/atomic.h: add atomic_set_mask() helper Since arches are expected to implement this guy, add a common version for people the same way as atomic_clear_mask is handled. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:10 -07:00
asm-generic/atomic.h: allow SMP peeps to leverage this Only a few core funcs need to be implemented for SMP systems, so allow the arches to override them while getting the rest for free. At least, this is enough to allow the Blackfin SMP port to use things. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:11 -07:00
asm-generic/atomic.h: add atomic_set_mask() helper Since arches are expected to implement this guy, add a common version for people the same way as atomic_clear_mask is handled. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Arun Sharma <asharma@fb.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:09:10 -07:00
asm-generic: add generic atomic.h and io.h atomic.h and io.h are based on the mn10300 architecture, which is already pretty generic and can be used by other architectures that do not have hardware support for atomic operations or out-of-order I/O access. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-05-13 22:56:35 +00:00