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authorNathan Chancellor <[email protected]>2020-04-06 20:10:45 -0700
committerLinus Torvalds <[email protected]>2020-04-07 10:43:43 -0700
commit8306b057a85ec07482da5d4b99d5c0b47af69be1 (patch)
treed94b01a748b0c99c94a2cf222e4a8655262e6747
parent295bcca84916cb5079140a89fccb472bb8d1f6e2 (diff)
lib/dynamic_debug.c: use address-of operator on section symbols
Clang warns: ../lib/dynamic_debug.c:1034:24: warning: array comparison always evaluates to false [-Wtautological-compare] if (__start___verbose == __stop___verbose) { ^ 1 warning generated. These are not true arrays, they are linker defined symbols, which are just addresses. Using the address of operator silences the warning and does not change the resulting assembly with either clang/ld.lld or gcc/ld (tested with diff + objdump -Dr). Suggested-by: Nick Desaulniers <[email protected]> Signed-off-by: Nathan Chancellor <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Acked-by: Jason Baron <[email protected]> Link: https://github.com/ClangBuiltLinux/linux/issues/894 Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]>
-rw-r--r--lib/dynamic_debug.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index aae17d9522e5..8f199f403ab5 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -1031,7 +1031,7 @@ static int __init dynamic_debug_init(void)
int n = 0, entries = 0, modct = 0;
int verbose_bytes = 0;
- if (__start___verbose == __stop___verbose) {
+ if (&__start___verbose == &__stop___verbose) {
pr_warn("_ddebug table is empty in a CONFIG_DYNAMIC_DEBUG build\n");
return 1;
}