Expose "Optimize for size" option for everybody

Let's put my money where my mouth is.  Smaller code is almost always
faster, if only because a single I$ miss ends up leaving a lot of cycles
to make up for.  And system software - kernels in particular - are known
for taking more cache misses than most other kinds.

On my random config, this made the kernel about 10% smaller, and lmbench
seems to say that it's pretty uniformly faster too. Your milage may vary.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/init/Kconfig b/init/Kconfig
index 59344616f477709198196f99a21b3b46511e8262..be74adb389eadd1a95cf07f1c92e5669e551b4aa 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -339,7 +339,7 @@ config EPOLL
          support for epoll family of system calls.
 
 config CC_OPTIMIZE_FOR_SIZE
-       bool "Optimize for size" if EMBEDDED
+       bool "Optimize for size"
        default y if ARM || H8300
        help
          Enabling this option will pass "-Os" instead of "-O2" to gcc