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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-18 13:57:00 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-12-18 13:57:00 +0000 |
| commit | 1ae1b5f053cf36bd0f913e83f3b136fec8152d4d (patch) | |
| tree | 6cdbeadac1efdca5ec36e44e362e058da3def680 | |
| parent | c15524a40a1603dc56a8691c4f50172fb86c23d8 (diff) | |
| download | linux-stable-1ae1b5f053cf36bd0f913e83f3b136fec8152d4d.tar.gz linux-stable-1ae1b5f053cf36bd0f913e83f3b136fec8152d4d.tar.bz2 linux-stable-1ae1b5f053cf36bd0f913e83f3b136fec8152d4d.zip | |
ARM: smp: avoid incrementing mm_users on CPU startup
We should not be incrementing mm_users when we startup a secondary
CPU - doing so results in mm_users incrementing by one each time we
hotplug a CPU, which will eventually wrap, and will cause problems.
Other architectures such as x86 do not increment mm_users, but only
mm_count, so we follow that pattern.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/kernel/smp.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 8c1959590252..9066473c0ebc 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -310,7 +310,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void) * All kernel threads share the same mm context; grab a * reference and switch to it. */ - atomic_inc(&mm->mm_users); atomic_inc(&mm->mm_count); current->active_mm = mm; cpumask_set_cpu(cpu, mm_cpumask(mm)); |