diff options
author | Kevin Hilman <khilman@linaro.org> | 2015-08-14 10:33:21 -0700 |
---|---|---|
committer | Kevin Hilman <khilman@linaro.org> | 2015-08-14 10:33:21 -0700 |
commit | 59255ac55ba6ecd195ef97c6bcd1303a7f838c94 (patch) | |
tree | c21899d772e8b55b74c9943f48ae88d3bd8724c9 /arch/arm64/mm/context.c | |
parent | 9106e24eb8e4dbe7f8de197317e68624ada540b0 (diff) | |
parent | 07818b5b1ba0f494a7255ab634bad2dd2b908ed0 (diff) |
Merge branch 'linux-linaro-lsk-v3.10' into linux-linaro-lsk-v3.10-rtlsk-v3.10-15.08-rt
Diffstat (limited to 'arch/arm64/mm/context.c')
-rw-r--r-- | arch/arm64/mm/context.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c index baa758d37021..76c1e6cd36fc 100644 --- a/arch/arm64/mm/context.c +++ b/arch/arm64/mm/context.c @@ -92,6 +92,14 @@ static void reset_context(void *info) unsigned int cpu = smp_processor_id(); struct mm_struct *mm = current->active_mm; + /* + * current->active_mm could be init_mm for the idle thread immediately + * after secondary CPU boot or hotplug. TTBR0_EL1 is already set to + * the reserved value, so no need to reset any context. + */ + if (mm == &init_mm) + return; + smp_rmb(); asid = cpu_last_asid + cpu; |