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| author | Joseph Myers <joseph@codesourcery.com> | 2014-06-25 11:31:51 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2014-06-25 11:31:51 +0000 |
| commit | 0f5b71850e7ae2a4fefade72c73556166d52bc93 (patch) | |
| tree | ca6c2144d884f4bc76a1d81aba36d2be90323e34 /sysdeps/unix/sysv/linux/readv.c | |
| parent | c7aec4beb13f125948884d80158f11c34239c61f (diff) | |
| download | glibc-0f5b71850e7ae2a4fefade72c73556166d52bc93.tar.gz | |
Remove __ASSUME_COMPLETE_READV_WRITEV.
This patch removes the __ASSUME_COMPLETE_READV_WRITEV
kernel-features.h macro, now that it can be unconditionally assumed to
be true. (The relevant kernel feature was added some time between 2.0
and 2.2, and this macro is only used in sysdeps/unix/sysv/linux/.)
Tested x86_64 that the disassembly of installed shared libraries is
unchanged by this patch.
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_COMPLETE_READV_WRITEV): Remove macro.
* sysdeps/unix/sysv/linux/readv.c: Do not include
<kernel-features.h>.
[!__ASSUME_COMPLETE_READV_WRITEV]: Remove conditional code.
[!UIO_FASTIOV] (UIO_FASTIOV): Remove macro.
(__libc_readv) [__ASSUME_COMPLETE_READV_WRITEV]: Make code
unconditional.
(__libc_readv) [!__ASSUME_COMPLETE_READV_WRITEV]: Remove
conditional code.
* sysdeps/unix/sysv/linux/writev.c: Do not include
<kernel-features.h>.
[!__ASSUME_COMPLETE_READV_WRITEV]: Remove conditional code.
[!UIO_FASTIOV] (UIO_FASTIOV): Remove macro.
(__libc_writev) [__ASSUME_COMPLETE_READV_WRITEV]: Make code
unconditional.
(__libc_writev) [!__ASSUME_COMPLETE_READV_WRITEV]: Remove
conditional code.
Diffstat (limited to 'sysdeps/unix/sysv/linux/readv.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/readv.c | 25 |
1 files changed, 1 insertions, 24 deletions
diff --git a/sysdeps/unix/sysv/linux/readv.c b/sysdeps/unix/sysv/linux/readv.c index 48eae46b81..a977d17748 100644 --- a/sysdeps/unix/sysv/linux/readv.c +++ b/sysdeps/unix/sysv/linux/readv.c @@ -23,19 +23,8 @@ #include <sysdep-cancel.h> #include <sys/syscall.h> -#include <kernel-features.h> - -#ifndef __ASSUME_COMPLETE_READV_WRITEV -static ssize_t __atomic_readv_replacement (int, const struct iovec *, - int) internal_function; -#endif - - -/* Not all versions of the kernel support the large number of records. */ -#ifndef UIO_FASTIOV -# define UIO_FASTIOV 8 /* 8 is a safe number. */ -#endif +/* Consider moving to syscalls.list. */ ssize_t __libc_readv (fd, vector, count) @@ -56,19 +45,7 @@ __libc_readv (fd, vector, count) LIBC_CANCEL_RESET (oldtype); } -#ifdef __ASSUME_COMPLETE_READV_WRITEV return result; -#else - if (result >= 0 || errno != EINVAL || count <= UIO_FASTIOV) - return result; - - return __atomic_readv_replacement (fd, vector, count); -#endif } strong_alias (__libc_readv, __readv) weak_alias (__libc_readv, readv) - -#ifndef __ASSUME_COMPLETE_READV_WRITEV -# define __libc_readv static internal_function __atomic_readv_replacement -# include <sysdeps/posix/readv.c> -#endif |