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authorVineet Gupta <vgupta@synopsys.com>2013-07-09 17:06:40 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-08-26 09:40:25 +0530
commitfce16bc35ae4a45634f3dc348d8d297a25c277cf (patch)
treead8bd83bf1ec3210208bad9a566a7585583ee876 /arch/arc/include/asm/irqflags.h
parent37f3ac498c988536f0d42b4659fb5d2c050b2f96 (diff)
ARC: Entry Handler tweaks: Optimize away redundant IRQ_DISABLE_SAVE
In the exception return path, for both U/K cases, intr are already disabled (for various existing reasons). So when we drop down to @restore_regs, we need not redo that. There was subtle issue - when intr were NOT being disabled for ret-to-kernel-but-no-preemption case - now fixed by moving the IRQ_DISABLE further up in @resume_kernel_mode. So what do we gain: * Shaves off a few insn in return path. * Eliminates the need for IRQ_DISABLE_SAVE assembler macro for ARCv2 hence allows for entry code sharing. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include/asm/irqflags.h')
-rw-r--r--arch/arc/include/asm/irqflags.h7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/arc/include/asm/irqflags.h b/arch/arc/include/asm/irqflags.h
index d99f79bcf865..b68b53f458d1 100644
--- a/arch/arc/include/asm/irqflags.h
+++ b/arch/arc/include/asm/irqflags.h
@@ -157,13 +157,6 @@ static inline void arch_unmask_irq(unsigned int irq)
flag \scratch
.endm
-.macro IRQ_DISABLE_SAVE scratch, save
- lr \scratch, [status32]
- mov \save, \scratch /* Make a copy */
- bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
- flag \scratch
-.endm
-
.macro IRQ_ENABLE scratch
lr \scratch, [status32]
or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)