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Consolidate Linux readahead implementation

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This patch consolidate Linux readahead implementation on generic
sysdeps/unix/sysv/linux/readahead.c one.  The changes are:

  - Assume __NR_readahead existence with current minimum kernel of 3.2
    for all architectures.

  - Use INLINE_SYSCALL_CALL, __ALIGNMENT_ARG, and SYSCALL_LL64 to pass
    the 64 bit offset.  This allows architectures with different abis
    to use the same implementation.

  - Remove arch-specific readahead implementations.

Checked on x86_64-linux-gnu and i686-linux-gnu.

	* sysdeps/unix/sysv/linux/arm/readahead.c: Remove file.
	* sysdeps/unix/sysv/linux/mips/mips32/readahead.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/syscalls.list (readahead):
	Remove.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/readahead.c (__readahead): Assume
	__NR_readahead existence, and use INLINE_SYSCALL_CALL, __ALIGNMENT_ARG,
	and SYSCALL_LL64.
This commit is contained in:
Adhemerval Zanella
2018-04-22 17:55:11 -03:00
parent 3392791442
commit c57bf7c15b
8 changed files with 17 additions and 66 deletions
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24
sysdeps/unix/sysv/linux/readahead.c
View File

@ -16,31 +16,15 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <errno.h>
#include <sysdep.h>
#include <sys/syscall.h>
#ifdef __NR_readahead
ssize_t
__readahead (int fd, off64_t offset, size_t count)
{
return INLINE_SYSCALL (readahead, 4, fd,
__LONG_LONG_PAIR ((off_t) (offset >> 32),
(off_t) (offset & 0xffffffff)),
count);
return INLINE_SYSCALL_CALL (readahead, fd,
__ALIGNMENT_ARG SYSCALL_LL64 (offset),
count);
}
#else
ssize_t
__readahead (int fd, off64_t offset, size_t count)
{
return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOSYS);
}
stub_warning (readahead)
#endif
weak_alias (__readahead, readahead)