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| author | Matthias Kaehlcke <mka@chromium.org> | 2019-04-23 12:04:22 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 09:35:40 +0200 |
| commit | 56714d4517b45acfb3747980fda39e018deb756a (patch) | |
| tree | 10cd526edc2b814d14fa083f121fda9650cf0b06 /Makefile | |
| parent | 74cec2565b14c3bd6d1c77d5e3ef9eaffab70404 (diff) | |
Revert "kbuild: use -Oz instead of -Os when using clang"
commit a75bb4eb9e565b9f5115e2e8c07377ce32cbe69a upstream.
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>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 3 |
1 files changed, 1 insertions, 2 deletions
@@ -653,8 +653,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) KBUILD_CFLAGS += $(call cc-disable-warning, attribute-alias) ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE -KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) -KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) +KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) else ifdef CONFIG_PROFILE_ALL_BRANCHES KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) |