sparc64: Do not save/restore interrupts in get_new_mmu_context()
get_new_mmu_context() is always called with interrupts disabled.
So it's possible to do this micro optimization.
(Also fix the comment to switch_mm, which is called in both cases)
Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
CC: David Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 076068f..4ccaa1b 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -681,10 +681,9 @@
{
unsigned long ctx, new_ctx;
unsigned long orig_pgsz_bits;
- unsigned long flags;
int new_version;
- spin_lock_irqsave(&ctx_alloc_lock, flags);
+ spin_lock(&ctx_alloc_lock);
orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK);
ctx = (tlb_context_cache + 1) & CTX_NR_MASK;
new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx);
@@ -720,7 +719,7 @@
out:
tlb_context_cache = new_ctx;
mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits;
- spin_unlock_irqrestore(&ctx_alloc_lock, flags);
+ spin_unlock(&ctx_alloc_lock);
if (unlikely(new_version))
smp_new_mmu_context_version();