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__ASSUME_FALLOCATE is always true on 32-bit architectures

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This means we can clean up the generic code a bit.  The 64-bit
variant still needs to support !__ASSUME_FALLOCATE for alpha.
This commit is contained in:
Florian Weimer
2015-04-24 13:50:18 +02:00
parent 4bd40bcf44
commit d0ccd0d977
6 changed files with 45 additions and 112 deletions
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36
sysdeps/unix/sysv/linux/posix_fallocate.c
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@ -16,44 +16,24 @@
<http://www.gnu.org/licenses/>. */
#include <fcntl.h>
#include <kernel-features.h>
#include <sysdep.h>
#define posix_fallocate static internal_fallocate
#include <sysdeps/posix/posix_fallocate.c>
#undef posix_fallocate
#if !defined __ASSUME_FALLOCATE && defined __NR_fallocate
int __have_fallocate attribute_hidden;
#endif
/* Reserve storage for the data of the file associated with FD. */
int
posix_fallocate (int fd, __off_t offset, __off_t len)
{
#ifdef __NR_fallocate
# ifndef __ASSUME_FALLOCATE
if (__glibc_likely (__have_fallocate >= 0))
# endif
{
INTERNAL_SYSCALL_DECL (err);
int res = INTERNAL_SYSCALL (fallocate, err, 6, fd, 0,
__LONG_LONG_PAIR (offset >> 31, offset),
__LONG_LONG_PAIR (len >> 31, len));
if (! INTERNAL_SYSCALL_ERROR_P (res, err))
return 0;
# ifndef __ASSUME_FALLOCATE
if (__glibc_unlikely (INTERNAL_SYSCALL_ERRNO (res, err) == ENOSYS))
__have_fallocate = -1;
else
# endif
if (INTERNAL_SYSCALL_ERRNO (res, err) != EOPNOTSUPP)
return INTERNAL_SYSCALL_ERRNO (res, err);
}
#endif
INTERNAL_SYSCALL_DECL (err);
int res = INTERNAL_SYSCALL (fallocate, err, 6, fd, 0,
__LONG_LONG_PAIR (offset >> 31, offset),
__LONG_LONG_PAIR (len >> 31, len));
if (! INTERNAL_SYSCALL_ERROR_P (res, err))
return 0;
if (INTERNAL_SYSCALL_ERRNO (res, err) != EOPNOTSUPP)
return INTERNAL_SYSCALL_ERRNO (res, err);
return internal_fallocate (fd, offset, len);
}