| Message ID | 1367829775-4434-1-git-send-email-kyungsik.lee@lge.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 001a13a..198a4ad 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -27,9 +27,6 @@ OBJS += misc.o decompress.o ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) OBJS += debug.o endif -ifeq ($(CONFIG_KERNEL_LZ4),y) -CFLAGS_decompress.o := -Os -endif FONTC = $(srctree)/drivers/video/console/font_acorn_8x8.c # string library code (-Os is enforced to keep it much smaller)
-Os is enforced here, based on the test result of decompression time below, slightly faster than -O2. But further tests with UA show that using -O2 will be the right choice especially in the case of the unaligned access enabled and the gap, few counts in the normal decompression mode is small enough to remove -Os. Decompression Time(counts) Normal UA enabled -Os 6717 3447 -O2 6720 2728 Note: ARM v7, Kernel 3.4 counter freq. = 32768 HZ UA(Unaligned Access) gcc version 4.6.2 Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Florian Fainelli <florian@openwrt.org> Cc: Yann Collet <yann.collet.73@gmail.com> --- arch/arm/boot/compressed/Makefile | 3 --- 1 file changed, 3 deletions(-)