include/linux/fs.h: fix unsigned enum warning with gcc-4.2
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>
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@ -2678,7 +2678,7 @@ static const char * const kernel_read_file_str[] = {
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static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
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{
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if (id < 0 || id >= READING_MAX_ID)
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if ((unsigned)id >= READING_MAX_ID)
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return kernel_read_file_str[READING_UNKNOWN];
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return kernel_read_file_str[id];
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