kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-24 19:10:26 +00:00
Code Issues Releases Packages Activity
linux/arch/parisc
History
Helge Deller dbeb9153de parisc: Mark cr16 CPU clocksource unstable on all SMP machines 
commit afdb4a5b1d upstream.

In commit c8c3735997 ("parisc: Enhance detection of synchronous cr16
clocksources") I assumed that CPUs on the same physical core are syncronous.
While booting up the kernel on two different C8000 machines, one with a
dual-core PA8800 and one with a dual-core PA8900 CPU, this turned out to be
wrong. The symptom was that I saw a jump in the internal clocks printed to the
syslog and strange overall behaviour.  On machines which have 4 cores (2
dual-cores) the problem isn't visible, because the current logic already marked
the cr16 clocksource unstable in this case.

This patch now marks the cr16 interval timers unstable if we have more than one
CPU in the system, and it fixes this issue.

Fixes: c8c3735997 ("parisc: Enhance detection of synchronous cr16 clocksources")
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v5.15+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2021-12-08 09:04:55 +01:00
..
boot parisc: Add missing FORCE prerequisite in Makefile 2021-09-09 12:44:30 +02:00
configs configs: remove the obsolete CONFIG_INPUT_POLLDEV 2021-09-08 11:50:28 -07:00
include Revert "parisc: Reduce sigreturn trampoline to 3 instructions" 2021-11-25 09:48:44 +01:00
kernel parisc: Mark cr16 CPU clocksource unstable on all SMP machines 2021-12-08 09:04:55 +01:00
lib parisc: Declare pci_iounmap() parisc version only when CONFIG_PCI enabled 2021-09-19 10:36:09 -07:00
math-emu parisc: math-emu: Fix fall-through warnings 2021-09-01 22:18:18 +02:00
mm parisc: fix warning in flush_tlb_all 2021-11-18 19:16:21 +01:00
defpalo.conf parisc: switch to gzip-compressed vmlinuz kernel 2013-07-09 22:09:20 +02:00
install.sh parisc: Fix "make install" on newer debian releases 2021-12-08 09:04:55 +01:00
Kbuild parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild 2021-08-30 10:18:25 +02:00
Kconfig firmware: include drivers/firmware/Kconfig unconditionally 2021-10-07 16:51:26 +02:00
Kconfig.debug tracing: Refactor TRACE_IRQFLAGS_SUPPORT in Kconfig 2021-08-16 11:37:21 -04:00
Makefile parisc: Fix KBUILD_IMAGE for self-extracting kernel 2021-12-08 09:04:55 +01:00
nm Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00