@@ -68,7 +68,7 @@ extern void smp_tsb_sync(struct mm_struct *mm);
extern void __flush_tlb_mm(unsigned long, unsigned long);
-/* Switch the current MM context. Interrupts are disabled. */
+/* Switch the current MM context. */
static inline void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm, struct task_struct *tsk)
{
unsigned long ctx_valid, flags;
@@ -681,10 +681,9 @@ void get_new_mmu_context(struct mm_struct *mm)
{
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 @@ void get_new_mmu_context(struct mm_struct *mm)
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();
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> --- arch/sparc/include/asm/mmu_context_64.h | 2 +- arch/sparc/mm/init_64.c | 5 ++--- 2 files changed, 3 insertions(+), 4 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html