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include/linux/fs.h: fix unsigned enum warning with gcc-4.2

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With arm-linux-gcc-4.2, almost every file we build in the kernel ends up
with this warning:

  include/linux/fs.h:2648: warning: comparison of unsigned expression < 0 is always false

Later versions don't have this problem, but it's easy enough to work
around.

Link: http://lkml.kernel.org/r/20161216105634.235457-12-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2017-03-09 16:16:57 -08:00 committed by Linus Torvalds
parent 8c9e7bb7a4
commit cbfd0c1001
1 changed files with 1 additions and 1 deletions
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2
include/linux/fs.h
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@ -2678,7 +2678,7 @@ static const char * const kernel_read_file_str[] = {
static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
{
if (id < 0 || id >= READING_MAX_ID)
if ((unsigned)id >= READING_MAX_ID)
return kernel_read_file_str[READING_UNKNOWN];
return kernel_read_file_str[id];