| author | Matthias Kaehlcke <mka@chromium.org> | 2019-04-23 19:04:25 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 07:34:46 (GMT) |
| commit | 6950577c4fc80f6da5f6c2e4b138d51b73b51e83 (patch) | |
| tree | 77381ddb25bdffece8e5cbd0a620dd9535eeeaa0 | |
| parent | 8a384d38baf58f39c432e32a04a32436e0e7d9d8 (diff) | |
| download | common-6950577c4fc80f6da5f6c2e4b138d51b73b51e83.zip common-6950577c4fc80f6da5f6c2e4b138d51b73b51e83.tar.gz common-6950577c4fc80f6da5f6c2e4b138d51b73b51e83.tar.bz2 | |
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>
| -rw-r--r-- | Makefile | 3 |
1 files changed, 1 insertions, 2 deletions
@@ -655,8 +655,7 @@ KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) endif 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,) |