Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1623210

[PATCH] x86/kbuild: Use cc-option to enable -falign-{jumps/loops}

Show all headers | View raw

clang currently does not support these optimizations, only enable them
when they are available.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
---
 arch/x86/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index a94a4d10f2df..73604e18447a 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -88,10 +88,10 @@ else
         KBUILD_CFLAGS += -m64
 
         # Align jump targets to 1 byte, not the default 16 bytes:
-        KBUILD_CFLAGS += -falign-jumps=1
+        KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)
 
         # Pack loops tightly as well:
-        KBUILD_CFLAGS += -falign-loops=1
+        KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)
 
         # Don't autogenerate traditional x87 instructions
         KBUILD_CFLAGS += $(call cc-option,-mno-80387)
-- 
2.12.2.715.g7642488e1d-goog

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH] x86/kbuild: Use cc-option to enable -falign-{jumps/loops} Matthias Kaehlcke <mka@chromium.org> - 2017-04-13 19:30 +0200
  [tip:x86/build] x86/kbuild: Use cc-option to enable  -falign-{jumps/loops} tip-bot for Matthias Kaehlcke <tipbot@zytor.com> - 2017-04-18 09:40 +0200

csiph-web