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| author |   Ralf Baechle <ralf@linux-mips.org> | 2007-09-03 16:22:26 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-09-10 21:25:28 +0100 |
| commit | 7b0fdaa6a193e0b07d9f72e942f51ce25d9e0387 (patch) | |
| tree | 5a930850752154a0a9e4b4458f67b04e756bf744 /include | |
| parent | [MIPS] Sibyte: Remove broken dependency on EXPERIMENTAL from SIBYTE_SB1xxx_SOC. (diff) | |
| download | linux-dev-7b0fdaa6a193e0b07d9f72e942f51ce25d9e0387.tar.xz linux-dev-7b0fdaa6a193e0b07d9f72e942f51ce25d9e0387.zip | |
[MIPS] Provide empty irq_enable_hazard definition for legacy and R1 cores.
Following a strict interpretation the empty definition of irq_enable_hazard
has always been a bug - but an intentional one because it didn't bite.
This has now changed, for uniprocessor kernels mm/slab.c:do_drain()
[...]
on_each_cpu(do_drain, cachep, 1, 1);
check_irq_on();
[...]
may be compiled into a mtc0 c0_status; mfc0 c0_status sequence resulting
in a back-to-back hazard.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-mips/hazards.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-mips/hazards.h b/include/asm-mips/hazards.h index 918a4894b587..6a5fa32f615b 100644 --- a/include/asm-mips/hazards.h +++ b/include/asm-mips/hazards.h @@ -172,6 +172,7 @@ ASMMACRO(tlb_probe_hazard, nop; nop; nop ) ASMMACRO(irq_enable_hazard, + _ssnop; _ssnop; _ssnop; ) ASMMACRO(irq_disable_hazard, nop; nop; nop |