get_mmu_context() opencodes atomic find_and_set_bit_wrap(). Simplify
it by using find_and_set_bit_wrap().
CC: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
Acked-by: Greg Ungerer <gerg@xxxxxxxxxxxxxx>
---
arch/m68k/include/asm/mmu_context.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/m68k/include/asm/mmu_context.h b/arch/m68k/include/asm/mmu_context.h
index 141bbdfad960..2e61063aa621 100644
--- a/arch/m68k/include/asm/mmu_context.h
+++ b/arch/m68k/include/asm/mmu_context.h
@@ -3,6 +3,7 @@
#define __M68K_MMU_CONTEXT_H
#include <asm-generic/mm_hooks.h>
+#include <linux/find_atomic.h>
#include <linux/mm_types.h>
#ifdef CONFIG_MMU
@@ -35,12 +36,11 @@ static inline void get_mmu_context(struct mm_struct *mm)
atomic_inc(&nr_free_contexts);
steal_context();
}
- ctx = next_mmu_context;
- while (test_and_set_bit(ctx, context_map)) {
- ctx = find_next_zero_bit(context_map, LAST_CONTEXT+1, ctx);
- if (ctx > LAST_CONTEXT)
- ctx = 0;
- }
+
+ do {
+ ctx = find_and_set_bit_wrap(context_map, LAST_CONTEXT + 1, next_mmu_context);
+ } while (ctx > LAST_CONTEXT);
+
next_mmu_context = (ctx + 1) & LAST_CONTEXT;
mm->context = ctx;
context_mm[ctx] = mm;
--
2.43.0
