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| author | Josh Boyer <jwboyer@redhat.com> | 2012-07-25 10:40:34 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-26 13:36:43 -0700 |
| commit | 8ded2bbc1845e19c771eb55209aab166ef011243 (patch) | |
| tree | 9ab400cdd407a9426fdfcc3432d7c0e19a0607ed /include/linux/time.h | |
| parent | 4cb38750d49010ae72e718d46605ac9ba5a851b4 (diff) | |
| download | lwn-8ded2bbc1845e19c771eb55209aab166ef011243.tar.gz lwn-8ded2bbc1845e19c771eb55209aab166ef011243.zip | |
posix_types.h: Cleanup stale __NFDBITS and related definitions
Recently, glibc made a change to suppress sign-conversion warnings in
FD_SET (glibc commit ceb9e56b3d1). This uncovered an issue with the
kernel's definition of __NFDBITS if applications #include
<linux/types.h> after including <sys/select.h>. A build failure would
be seen when passing the -Werror=sign-compare and -D_FORTIFY_SOURCE=2
flags to gcc.
It was suggested that the kernel should either match the glibc
definition of __NFDBITS or remove that entirely. The current in-kernel
uses of __NFDBITS can be replaced with BITS_PER_LONG, and there are no
uses of the related __FDELT and __FDMASK defines. Given that, we'll
continue the cleanup that was started with commit 8b3d1cda4f5f
("posix_types: Remove fd_set macros") and drop the remaining unused
macros.
Additionally, linux/time.h has similar macros defined that expand to
nothing so we'll remove those at the same time.
Reported-by: Jeff Law <law@redhat.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
CC: <stable@vger.kernel.org>
Signed-off-by: Josh Boyer <jwboyer@redhat.com>
[ .. and fix up whitespace as per akpm ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/time.h')
| -rw-r--r-- | include/linux/time.h | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/include/linux/time.h b/include/linux/time.h index 179f4d6755fc..c81c5e40fcb5 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -257,14 +257,6 @@ static __always_inline void timespec_add_ns(struct timespec *a, u64 ns) #endif /* __KERNEL__ */ -#define NFDBITS __NFDBITS - -#define FD_SETSIZE __FD_SETSIZE -#define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp) -#define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp) -#define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp) -#define FD_ZERO(fdsetp) __FD_ZERO(fdsetp) - /* * Names of the interval timers, and structure * defining a timer setting: |