powerpc: Fix compiler warning on some syscalls

GCC 5.0 emits an warning when using sizeof on array function parameters
and powerpc internal syscall macros add a check for such cases.  More
specifically, on powerpc64 and powerpc32 sysdep.h:

  if (__builtin_classify_type (__arg3) != 5 && sizeof (__arg3) > 8) \
          __illegally_sized_syscall_arg3 (); \

And for sysdeps/unix/sysv/linux/utimensat.c build GCC emits:

error: ‘sizeof’ on array function parameter ‘tsp’ will return size of
‘const struct timespec *’

This patch uses the address of first struct member instead of the struct
itself in syscall macro.

5 files changed, 18 insertions, 8 deletions

diff --git a/ChangeLog b/ChangeLog
index 9066946203..962ec26550 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2015-01-08  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>
+
+	* sysdeps/unix/sysv/linux/futimens.c (futimens): Use address of first
+	timespec struct member in syscall macro.
+	* sysdeps/unix/sysv/linux/utimensat.c (utimensat): Likewise.
+	* sysdeps/unix/sysv/linux/futimesat.c (futimesat): Use address of
+	first timeval struct member in syscall macro.
+	* sysdeps/unix/sysv/linux/utimes.c (__utimeS): Likewise.
+
 2015-01-07  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #17748]
diff --git a/sysdeps/unix/sysv/linux/futimens.c b/sysdeps/unix/sysv/linux/futimens.c
index c7d03a8f7c..5f2b8a56cd 100644
--- a/sysdeps/unix/sysv/linux/futimens.c
+++ b/sysdeps/unix/sysv/linux/futimens.c
@@ -37,7 +37,8 @@ futimens (int fd, const struct timespec tsp[2])
       __set_errno (EBADF);
       return -1;
     }
-  return INLINE_SYSCALL (utimensat, 4, fd, NULL, tsp, 0);
+  /* Avoid implicit array coercion in syscall macros.  */
+  return INLINE_SYSCALL (utimensat, 4, fd, NULL, &tsp[0], 0);
 #else
   __set_errno (ENOSYS);
   return -1;
diff --git a/sysdeps/unix/sysv/linux/futimesat.c b/sysdeps/unix/sysv/linux/futimesat.c
index ac96e2af39..27d68702e1 100644
--- a/sysdeps/unix/sysv/linux/futimesat.c
+++ b/sysdeps/unix/sysv/linux/futimesat.c
@@ -28,13 +28,11 @@
 /* Change the access time of FILE relative to FD to TVP[0] and
    the modification time of FILE to TVP[1].  */
 int
-futimesat (fd, file, tvp)
-     int fd;
-     const char *file;
-     const struct timeval tvp[2];
+futimesat (int fd, const char *file, const struct timeval tvp[2])
 {
   if (file == NULL)
     return __futimes (fd, tvp);
 
-  return INLINE_SYSCALL (futimesat, 3, fd, file, tvp);
+  /* Avoid implicit array coercion in syscall macros.  */
+  return INLINE_SYSCALL (futimesat, 3, fd, file, &tvp[0]);
 }
diff --git a/sysdeps/unix/sysv/linux/utimensat.c b/sysdeps/unix/sysv/linux/utimensat.c
index 5a5dec7f8e..81b565f2ea 100644
--- a/sysdeps/unix/sysv/linux/utimensat.c
+++ b/sysdeps/unix/sysv/linux/utimensat.c
@@ -35,7 +35,8 @@ utimensat (int fd, const char *file, const struct timespec tsp[2],
       return -1;
     }
 #ifdef __NR_utimensat
-  return INLINE_SYSCALL (utimensat, 4, fd, file, tsp, flags);
+  /* Avoid implicit array coercion in syscall macros.  */
+  return INLINE_SYSCALL (utimensat, 4, fd, file, &tsp[0], flags);
 #else
   __set_errno (ENOSYS);
   return -1;
diff --git a/sysdeps/unix/sysv/linux/utimes.c b/sysdeps/unix/sysv/linux/utimes.c
index 5423ff200f..2a1f2f90a1 100644
--- a/sysdeps/unix/sysv/linux/utimes.c
+++ b/sysdeps/unix/sysv/linux/utimes.c
@@ -29,7 +29,8 @@
 int
 __utimes (const char *file, const struct timeval tvp[2])
 {
-  return INLINE_SYSCALL (utimes, 2, file, tvp);
+  /* Avoid implicit array coercion in syscall macros.  */
+  return INLINE_SYSCALL (utimes, 2, file, &tvp[0]);
 }
 
 weak_alias (__utimes, utimes)