From 9a93848fe787a53aec404e4e00d8f7f9bbdaebb4 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 2 Feb 2017 14:43:51 +0100 Subject: x86/debug: Implement __WARN() using UD0 By using "UD0" for WARN()s we remove the function call and its possible __FILE__ and __LINE__ immediate arguments from the instruction stream. Total image size will not change much, what we win in the instruction stream we'll lose because of the __bug_table entries. Still, saves on I$ footprint and the total image size does go down a bit. text data filename 10702123 4530992 defconfig-build/vmlinux.orig 10682460 4530992 defconfig-build/vmlinux.patched (UML didn't seem to use GENERIC_BUG at all, so remove it) Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Josh Poimboeuf Cc: Arjan van de Ven Cc: Borislav Petkov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Richard Weinberger Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar --- arch/um/Kconfig.common | 5 ----- 1 file changed, 5 deletions(-) (limited to 'arch/um') diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common index fd443852103c..ed9c5b5ff028 100644 --- a/arch/um/Kconfig.common +++ b/arch/um/Kconfig.common @@ -50,11 +50,6 @@ config GENERIC_CALIBRATE_DELAY bool default y -config GENERIC_BUG - bool - default y - depends on BUG - config HZ int default 100 -- cgit v1.2.3