path: root/arch/arm/kernel/suspend.c
diff options
authorWill Deacon <will.deacon@arm.com>2013-02-28 17:48:40 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-03-03 22:54:16 +0000
commit89c7e4b8bbb3d4fa52df5746a8ad38e610143651 (patch)
treef6d3d835f5fca88fd4de01f166d782f16c2fe3c9 /arch/arm/kernel/suspend.c
parent862c588f062fe9339a180cf6429e4df1855c376a (diff)
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')
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c
index 358bca3a995..c59c97ea826 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();