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| author | George Burgess IV <gbiv@google.com> | 2020-04-21 04:14:01 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-21 21:11:55 +0300 |
| commit | a21151b9d81a69ce334f409e7f98e50e3b8fa984 (patch) | |
| tree | f566258df63cb13714ff08948c9a3463c52bc2de /tools/build | |
| parent | 461e1565366e84f7c9ccaf40730e4e892c70700f (diff) | |
| download | linux-a21151b9d81a69ce334f409e7f98e50e3b8fa984.tar.xz | |
tools/build: tweak unused value workaround
Clang has -Wself-assign enabled by default under -Wall, which always
gets -Werror'ed on this file, causing sync-compare-and-swap to be
disabled by default.
The generally-accepted way to spell "this value is intentionally
unused," is casting it to `void`. This is accepted by both GCC and
Clang with -Wall enabled: https://godbolt.org/z/qqZ9r3
Signed-off-by: George Burgess IV <gbiv@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Link: http://lkml.kernel.org/r/20200414195638.156123-1-gbiv@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/build')
| -rw-r--r-- | tools/build/feature/test-sync-compare-and-swap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/build/feature/test-sync-compare-and-swap.c b/tools/build/feature/test-sync-compare-and-swap.c index 1e38d1930a97..3bc6b0768a53 100644 --- a/tools/build/feature/test-sync-compare-and-swap.c +++ b/tools/build/feature/test-sync-compare-and-swap.c @@ -7,7 +7,7 @@ int main(int argc, char *argv[]) { uint64_t old, new = argc; - argv = argv; + (void)argv; do { old = __sync_val_compare_and_swap(&x, 0, 0); } while (!__sync_bool_compare_and_swap(&x, old, new)); |