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authorNathan Chancellor <natechancellor@gmail.com>2020-04-07 05:10:45 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-07 19:43:43 +0200
commit8306b057a85ec07482da5d4b99d5c0b47af69be1 (patch)
treed94b01a748b0c99c94a2cf222e4a8655262e6747 /lib
parentlinux/bits.h: add compile time sanity check of GENMASK inputs (diff)
downloadlinux-8306b057a85ec07482da5d4b99d5c0b47af69be1.tar.xz
linux-8306b057a85ec07482da5d4b99d5c0b47af69be1.zip
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 <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Jason Baron <jbaron@akamai.com> Link: https://github.com/ClangBuiltLinux/linux/issues/894 Link: http://lkml.kernel.org/r/20200220051320.10739-1-natechancellor@gmail.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-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;
}