From 7b0fdaa6a193e0b07d9f72e942f51ce25d9e0387 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Mon, 3 Sep 2007 16:22:26 +0200 Subject: [PATCH] [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 --- include/asm-mips/hazards.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/asm-mips/hazards.h b/include/asm-mips/hazards.h index 918a489..6a5fa32 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 -- 2.7.4