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authorH. Peter Anvin <hpa@zytor.com>2012-02-08 09:09:05 +0400
committerH. Peter Anvin <hpa@zytor.com>2012-02-15 00:47:21 +0400
commit8b3d1cda4f5ff0d7c2ae910ea8fd03493996912f (patch)
treec03be096f3e8b3205e749277d7274ec5ea95fae7 /include/linux/time.h
parent2759e6512e0bd9f9a84e10f59fb71195e7ff9775 (diff)
downloadlinux-8b3d1cda4f5ff0d7c2ae910ea8fd03493996912f.tar.xz
posix_types: Remove fd_set macros
<asm/posix_types.h> includes a set of macros that operate on file descriptors. Way long ago those were exported to user space, but nowadays they are #ifdef __KERNEL__. However, they are nothing but standard (nonatomic) bit operations, and we already have optimized versions of bit operations in the kernel. We can't include <linux/bitops.h> in <asm/posix_types.h> but we can move the definitions to <linux/time.h> and define them there in terms of standard kernel bitops. [ v2: folds the following fixes in: a) Stray space in __FD_SET(), reported by Andrew Morton b) #include <linux/string.h> needed for memset(), reported by Tony Luck ] Signed-off-by: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/r/1328677745-20121-22-git-send-email-hpa@zytor.com Cc: Arnd Bergmann <arnd@arndb.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/time.h')
-rw-r--r--include/linux/time.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/time.h b/include/linux/time.h
index b3061782dec3..93277a0b2293 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -4,8 +4,11 @@
#include <linux/types.h>
#ifdef __KERNEL__
+# include <linux/bitops.h>
# include <linux/cache.h>
+# include <linux/posix_types.h>
# include <linux/seqlock.h>
+# include <linux/string.h>
# include <linux/math64.h>
#endif
@@ -256,6 +259,27 @@ static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
a->tv_nsec = ns;
}
+
+static inline void __FD_SET(unsigned long __fd, __kernel_fd_set *__fdsetp)
+{
+ __set_bit(__fd, __fdsetp->fds_bits);
+}
+
+static inline void __FD_CLR(unsigned long __fd, __kernel_fd_set *__fdsetp)
+{
+ __clear_bit(__fd, __fdsetp->fds_bits);
+}
+
+static inline int __FD_ISSET(unsigned long __fd, const __kernel_fd_set *__fdsetp)
+{
+ return test_bit(__fd, __fdsetp->fds_bits);
+}
+
+static inline void __FD_ZERO(__kernel_fd_set *__fdsetp)
+{
+ memset(__fdsetp->fds_bits, 0, sizeof __fdsetp->fds_bits);
+}
+
#endif /* __KERNEL__ */
#define NFDBITS __NFDBITS