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linux/arch/parisc
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Helge Deller b8e7ee1d9c parisc: Fix CONFIG_TLB_PTLOCK to work with lightweight spinlock checks 
commit 7a894c8737 upstream.

For the TLB_PTLOCK checks we used an optimization to store the spc
register into the spinlock to unlock it. This optimization works as
long as the lightweight spinlock checks (CONFIG_LIGHTWEIGHT_SPINLOCK_CHECK)
aren't enabled, because they really check if the lock word is zero or
__ARCH_SPIN_LOCK_UNLOCKED_VAL and abort with a kernel crash
("Spinlock was trashed") otherwise.

Drop that optimization to make it possible to activate both checks
at the same time.

Noticed-by: Sam James <sam@gentoo.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Tested-by: Sam James <sam@gentoo.org>
Cc: stable@vger.kernel.org # v6.4+
Fixes: 15e64ef652 ("parisc: Add lightweight spinlock checks")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2023-08-23 17:32:52 +02:00
..
boot Kbuild updates for v5.17 2022-01-19 11:15:19 +02:00
configs parisc: Update 32- and 64-bit defconfigs 2022-05-08 20:01:11 +02:00
include parisc: Fix lightweight spinlock checks to not break futexes 2023-08-16 18:32:18 +02:00
kernel parisc: Fix CONFIG_TLB_PTLOCK to work with lightweight spinlock checks 2023-08-23 17:32:52 +02:00
lib parisc: Drop homebrewn io[read|write]64_[lo_hi|hi_lo] 2022-09-23 21:52:27 +02:00
math-emu parisc: align '*' in comment in math-emu code 2022-06-26 00:19:27 +02:00
mm parisc/mm: preallocate fixmap page tables at init 2023-08-11 12:14:22 +02:00
defpalo.conf parisc: switch to gzip-compressed vmlinuz kernel 2013-07-09 22:09:20 +02:00
install.sh kbuild: factor out the common installation code into scripts/install.sh 2022-05-11 21:45:53 +09:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig parisc: Enable LOCKDEP support 2023-05-24 14:27:28 +02:00
Kconfig.debug parisc: Fix lightweight spinlock checks to not break futexes 2023-08-16 18:32:18 +02:00
Makefile kbuild: remove head-y syntax 2022-10-02 18:06:03 +09:00