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authorIngo Molnar <mingo@elte.hu>2006-03-23 02:59:29 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-23 07:38:03 -0800
commitb824eb605ccba995fd32c6590aed365f93d48002 (patch)
treef5720240b044b46ac83e127e2c5586cd8ef2ed75
parent69ef4141e03fab1c6956d3c760584c72b548a26f (diff)
downloadop-kernel-dev-b824eb605ccba995fd32c6590aed365f93d48002.zip
op-kernel-dev-b824eb605ccba995fd32c6590aed365f93d48002.tar.gz
[PATCH] Make CONFIG_REGPARM enabled by default
Make CONFIG_REGPARM enabled by default. It's a noticable win both for size and for performance, and gcc[34] handles it correctly. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/i386/Kconfig12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 69c8a70e..5f89c74 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -661,9 +661,17 @@ config BOOT_IOREMAP
config REGPARM
bool "Use register arguments"
+ default y
help
- Compile the kernel with -mregparm=3. This uses a different ABI
- and passes the first three arguments of a function call in registers.
+ Compile the kernel with -mregparm=3. This instructs gcc to use
+ a more efficient function call ABI which passes the first three
+ arguments of a function call via registers, which results in denser
+ and faster code.
+
+ If this option is disabled, then the default ABI of passing
+ arguments via the stack is used.
+
+ If unsure, say Y.
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
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