From: Josh Triplett The functions prepare_set and post_set in kernel/cpu/mtrr/generic.c wrap the spinlock set_atomicity_lock: prepare_set returns with the lock held, and post_set releases the lock without acquiring it. Add lock annotations to these two functions so that sparse can check callers for lock pairing, and so that sparse will not complain about these functions since they intentionally use locks in this manner. Signed-off-by: Josh Triplett Signed-off-by: Andrew Morton --- arch/i386/kernel/cpu/mtrr/generic.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff -puN arch/i386/kernel/cpu/mtrr/generic.c~mtrr-add-lock-annotations-for-prepare_set-and arch/i386/kernel/cpu/mtrr/generic.c --- a/arch/i386/kernel/cpu/mtrr/generic.c~mtrr-add-lock-annotations-for-prepare_set-and +++ a/arch/i386/kernel/cpu/mtrr/generic.c @@ -243,7 +243,7 @@ static DEFINE_SPINLOCK(set_atomicity_loc * has been called. */ -static void prepare_set(void) +static void prepare_set(void) __acquires(set_atomicity_lock) { unsigned long cr0; @@ -274,7 +274,7 @@ static void prepare_set(void) mtrr_wrmsr(MTRRdefType_MSR, deftype_lo & 0xf300UL, deftype_hi); } -static void post_set(void) +static void post_set(void) __releases(set_atomicity_lock) { /* Flush TLBs (no need to flush caches - they are disabled) */ __flush_tlb(); _