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author | Will Deacon <will.deacon@arm.com> | 2013-02-28 20:48:40 +0400 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-03-04 02:54:16 +0400 |
commit | 89c7e4b8bbb3d4fa52df5746a8ad38e610143651 (patch) | |
tree | f6d3d835f5fca88fd4de01f166d782f16c2fe3c9 /arch/arm/kernel/suspend.c | |
parent | 862c588f062fe9339a180cf6429e4df1855c376a (diff) | |
download | linux-89c7e4b8bbb3d4fa52df5746a8ad38e610143651.tar.xz |
ARM: 7661/1: mm: perform explicit branch predictor maintenance when required
The ARM ARM requires branch predictor maintenance if, for a given ASID,
the instructions at a specific virtual address appear to change.
From the kernel's point of view, that means:
- Changing the kernel's view of memory (e.g. switching to the
identity map)
- ASID rollover (since ASIDs will be re-allocated to new tasks)
This patch adds explicit branch predictor maintenance when either of the
two conditions above are met.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/suspend.c')
-rw-r--r-- | arch/arm/kernel/suspend.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c index 358bca3a995e..c59c97ea8268 100644 --- a/arch/arm/kernel/suspend.c +++ b/arch/arm/kernel/suspend.c @@ -68,6 +68,7 @@ int cpu_suspend(unsigned long arg, int (*fn)(unsigned long)) ret = __cpu_suspend(arg, fn); if (ret == 0) { cpu_switch_mm(mm->pgd, mm); + local_flush_bp_all(); local_flush_tlb_all(); } |