From: Andi Kleen <a...@linux.intel.com>
pagefault_disabled_dec is frequently used inline, and it has a WARN_ON
for underflow that expands to about 6.5k of extra code. The warning
doesn't seem to be that useful and worth so much code so remove it.
If it was needed could make it depending on some debug kernel option.
Saves ~6.5k in my kernel
text data bss dec hex filename
9039417 5367568 11116544 25523529 1857549 vmlinux-before-pf
9032805 5367568 11116544 25516917 1855b75 vmlinux-pf
Signed-off-by: Andi Kleen <a...@linux.intel.com>
---
include/linux/uaccess.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index f30c187ed785..b691aad918fb 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -12,7 +12,6 @@ static __always_inline void pagefault_disabled_inc(void)
static __always_inline void pagefault_disabled_dec(void)
{
current->pagefault_disabled--;
- WARN_ON(current->pagefault_disabled < 0);
}
/*
--
2.9.3
