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| author | Matthias Kaehlcke <mka@chromium.org> | 2019-03-18 17:10:05 -0400 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-03-20 22:27:29 +0900 |
| commit | a75bb4eb9e565b9f5115e2e8c07377ce32cbe69a (patch) | |
| tree | 57802d72d818c02d9885d471179195bb6ea523e1 | |
| parent | 9e98c678c2d6ae3a17cb2de55d17f69dddaa231b (diff) | |
| download | lwn-a75bb4eb9e565b9f5115e2e8c07377ce32cbe69a.tar.gz lwn-a75bb4eb9e565b9f5115e2e8c07377ce32cbe69a.zip | |
Revert "kbuild: use -Oz instead of -Os when using clang"
The clang option -Oz enables *aggressive* optimization for size,
which doesn't necessarily result in smaller images, but can have
negative impact on performance. Switch back to the less aggressive
-Os.
This reverts commit 6748cb3c299de1ffbe56733647b01dbcc398c419.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
| -rw-r--r-- | Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
@@ -677,7 +677,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE -KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) +KBUILD_CFLAGS += -Os else KBUILD_CFLAGS += -O2 endif |