mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()
Reduce the number of invalid loops of the function early_ioremap_setup()
to improve the efficiency of function execution
Link: https://lkml.kernel.org/r/CACZJ9cU6t5sLoDwE6_XOg+UJLpZt4+qHfjYN2bA0s+3y9y6pQQ@mail.gmail.com
Signed-off-by: LiamNi <zhiguangni01@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c
index 9bc12e5..ce06b28 100644
--- a/mm/early_ioremap.c
+++ b/mm/early_ioremap.c
@@ -72,12 +72,10 @@ void __init early_ioremap_setup(void)
{
int i;
- for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
- if (WARN_ON(prev_map[i]))
- break;
-
- for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
+ for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+ WARN_ON_ONCE(prev_map[i]);
slot_virt[i] = __fix_to_virt(FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*i);
+ }
}
static int __init check_early_ioremap_leak(void)
