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authorJosh Boyer <jwboyer@redhat.com>2012-07-25 10:40:34 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-08-09 08:31:39 -0700
commit27cd8f51344dcf4799c7a092c1797402b833126a (patch)
tree4af5fa7d852c6f73795dd0ea9508b86283fb009e /include
parentb6e9ffcdb09fbf28665e025aa31fda702689786c (diff)
posix_types.h: Cleanup stale __NFDBITS and related definitions
commit 8ded2bbc1845e19c771eb55209aab166ef011243 upstream. 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> Signed-off-by: Josh Boyer <jwboyer@redhat.com> [ .. and fix up whitespace as per akpm ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/posix_types.h18
-rw-r--r--include/linux/time.h8
2 files changed, 3 insertions, 23 deletions
diff --git a/include/linux/posix_types.h b/include/linux/posix_types.h
index f04c98cf44f3..988f76e636e3 100644
--- a/include/linux/posix_types.h
+++ b/include/linux/posix_types.h
@@ -15,26 +15,14 @@
*/
/*
- * Those macros may have been defined in <gnu/types.h>. But we always
- * use the ones here.
+ * This macro may have been defined in <gnu/types.h>. But we always
+ * use the one here.
*/
-#undef __NFDBITS
-#define __NFDBITS (8 * sizeof(unsigned long))
-
#undef __FD_SETSIZE
#define __FD_SETSIZE 1024
-#undef __FDSET_LONGS
-#define __FDSET_LONGS (__FD_SETSIZE/__NFDBITS)
-
-#undef __FDELT
-#define __FDELT(d) ((d) / __NFDBITS)
-
-#undef __FDMASK
-#define __FDMASK(d) (1UL << ((d) % __NFDBITS))
-
typedef struct {
- unsigned long fds_bits [__FDSET_LONGS];
+ unsigned long fds_bits[__FD_SETSIZE / (8 * sizeof(long))];
} __kernel_fd_set;
/* Type of a signal handler. */
diff --git a/include/linux/time.h b/include/linux/time.h
index 33a92ead4d88..8da51299a7d5 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -258,14 +258,6 @@ 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: