diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 01:27:46 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-05-08 01:27:46 +0200 |
| commit | 9b3539e0e545e4c2f338acfc1ce52033a6f5e7f7 (patch) | |
| tree | 5c56e4a208dbe7e985e59911e1a421a7c1ee024c /arch/tile/include/asm/irqflags.h | |
| parent | 3d39019a1655d195a60a86ebf38f9da30bd83d03 (diff) | |
| parent | 1cd1c049271233deccfcc75123afa7f39a607f5a (diff) | |
Merge branch 'mips-next-3.10' of git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next
Diffstat (limited to 'arch/tile/include/asm/irqflags.h')
| -rw-r--r-- | arch/tile/include/asm/irqflags.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/tile/include/asm/irqflags.h b/arch/tile/include/asm/irqflags.h index 241c0bb60b12..c96f9bbb760d 100644 --- a/arch/tile/include/asm/irqflags.h +++ b/arch/tile/include/asm/irqflags.h @@ -40,7 +40,15 @@ #include <asm/percpu.h> #include <arch/spr_def.h> -/* Set and clear kernel interrupt masks. */ +/* + * Set and clear kernel interrupt masks. + * + * NOTE: __insn_mtspr() is a compiler builtin marked as a memory + * clobber. We rely on it being equivalent to a compiler barrier in + * this code since arch_local_irq_save() and friends must act as + * compiler barriers. This compiler semantic is baked into enough + * places that the compiler will maintain it going forward. + */ #if CHIP_HAS_SPLIT_INTR_MASK() #if INT_PERF_COUNT < 32 || INT_AUX_PERF_COUNT < 32 || INT_MEM_ERROR >= 32 # error Fix assumptions about which word various interrupts are in |