>From "include/uapi/asm-generic/statfs.h" it is seen that "statfs.f_type" is of
type "__statfs_word" which in its turn is "__u32" (unsigned int) for 32-bit
systems.
So in case of compilation with "-Werror" following breakage happens:
--->---
fs.c: In function ‘fs__valid_mount’:
fs.c:76:24: error: comparison between signed and unsigned integer expressions
[-Werror=sign-compare]
else if (st_fs.f_type != magic)
^
cc1: all warnings being treated as errors
--->---
Note that now when fs.c is in "lib/api/fs" and in "tools/lib/api/Makefile"
CFLAGS has hard-coded "-Werror" this is inevitable even if one builds "perf"
with "WERROR=0".
Signed-off-by: Alexey Brodkin <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Cody P Schafer <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
---
tools/lib/api/fs/fs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index c1b49c3..4b2fa7b 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -75,7 +75,7 @@ static int fs__valid_mount(const char *fs, long magic)
if (statfs(fs, &st_fs) < 0)
return -ENOENT;
- else if (st_fs.f_type != magic)
+ else if ((long)st_fs.f_type != magic)
return -ENOENT;
return 0;
--
1.9.3
--
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