| commit ce27c888c66dbf8e0046c322bbc2b883c3398d92 |
| Author: George Burgess IV <gbiv@google.com> |
| Date: Sat Apr 18 16:02:56 2020 +1000 |
| |
| 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 |
| |
| Link: http://lkml.kernel.org/r/20200414195638.156123-1-gbiv@google.com |
| Signed-off-by: George Burgess IV <gbiv@google.com> |
| Cc: Nick Desaulniers <ndesaulniers@google.com> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> |
| |
| 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)); |
