Linux: Clean up preadv2, pwritev2 system call names

With the built-in tables __NR_preadv2 and __NR_pwritev2 are always
defined.

The kernel has never defined __NR_preadv64v2 and __NR_pwritev64v2
and is unlikely to do so, given that the preadv2 and pwritev2 system
calls themselves are 64-bit.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

4 files changed, 7 insertions, 22 deletions

diff --git a/sysdeps/unix/sysv/linux/preadv2.c b/sysdeps/unix/sysv/linux/preadv2.c
index 5f1a83589e..4e3aa923da 100644
--- a/sysdeps/unix/sysv/linux/preadv2.c
+++ b/sysdeps/unix/sysv/linux/preadv2.c
@@ -21,20 +21,15 @@
 
 #ifndef __OFF_T_MATCHES_OFF64_T
 
-# if !defined (__NR_preadv2) && defined (__NR_pread64v2)
-#  define __NR_preadv2 __NR_pread64v2
-# endif
-
 ssize_t
 preadv2 (int fd, const struct iovec *vector, int count, off_t offset,
 	 int flags)
 {
-# ifdef __NR_preadv2
   ssize_t result = SYSCALL_CANCEL (preadv2, fd, vector, count,
 				   LO_HI_LONG (offset), flags);
   if (result >= 0 || errno != ENOSYS)
     return result;
-# endif
+
   /* Trying to emulate the preadv2 syscall flags is troublesome:
 
      * We can not temporary change the file state of the O_DSYNC and O_SYNC
diff --git a/sysdeps/unix/sysv/linux/preadv64v2.c b/sysdeps/unix/sysv/linux/preadv64v2.c
index f1e52711cb..1bf1a4c696 100644
--- a/sysdeps/unix/sysv/linux/preadv64v2.c
+++ b/sysdeps/unix/sysv/linux/preadv64v2.c
@@ -19,20 +19,15 @@
 #include <sys/uio.h>
 #include <sysdep-cancel.h>
 
-#if !defined(__NR_preadv64v2) && defined(__NR_preadv2)
-# define __NR_preadv64v2 __NR_preadv2
-#endif
-
 ssize_t
 preadv64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
 	    int flags)
 {
-#ifdef __NR_preadv64v2
-  ssize_t result = SYSCALL_CANCEL (preadv64v2, fd, vector, count,
+  ssize_t result = SYSCALL_CANCEL (preadv2, fd, vector, count,
 				   LO_HI_LONG (offset), flags);
   if (result >= 0 || errno != ENOSYS)
     return result;
-#endif
+
   /* Trying to emulate the preadv2 syscall flags is troublesome:
 
      * We can not temporary change the file state of the O_DSYNC and O_SYNC
diff --git a/sysdeps/unix/sysv/linux/pwritev2.c b/sysdeps/unix/sysv/linux/pwritev2.c
index 53ab5e7613..a179654970 100644
--- a/sysdeps/unix/sysv/linux/pwritev2.c
+++ b/sysdeps/unix/sysv/linux/pwritev2.c
@@ -25,12 +25,12 @@ ssize_t
 pwritev2 (int fd, const struct iovec *vector, int count, off_t offset,
 	  int flags)
 {
-# ifdef __NR_pwritev2
+
   ssize_t result = SYSCALL_CANCEL (pwritev2, fd, vector, count,
 				   LO_HI_LONG (offset), flags);
   if (result >= 0 || errno != ENOSYS)
     return result;
-# endif
+
   /* Trying to emulate the pwritev2 syscall flags is troublesome:
 
      * We can not temporary change the file state of the O_DSYNC and O_SYNC
diff --git a/sysdeps/unix/sysv/linux/pwritev64v2.c b/sysdeps/unix/sysv/linux/pwritev64v2.c
index ba95eefcd9..8df32528b7 100644
--- a/sysdeps/unix/sysv/linux/pwritev64v2.c
+++ b/sysdeps/unix/sysv/linux/pwritev64v2.c
@@ -19,20 +19,15 @@
 #include <sys/uio.h>
 #include <sysdep-cancel.h>
 
-#if !defined(__NR_pwritev64v2) && defined(__NR_pwritev2)
-# define __NR_pwritev64v2 __NR_pwritev2
-#endif
-
 ssize_t
 pwritev64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
 	     int flags)
 {
-#ifdef __NR_pwritev64v2
-  ssize_t result = SYSCALL_CANCEL (pwritev64v2, fd, vector, count,
+  ssize_t result = SYSCALL_CANCEL (pwritev2, fd, vector, count,
 				   LO_HI_LONG (offset), flags);
   if (result >= 0 || errno != ENOSYS)
     return result;
-#endif
+
   /* Trying to emulate the pwritev2 syscall flags is troublesome:
 
      * We can not temporary change the file state of the O_DSYNC and O_SYNC