[XTENSA] Fix fadvise64_64

Xtensa passes long long arguments in a even/odd register pair,
so we also need to shuffle the arguments when passed through the
system call to avoid an empty argument register.

Signed-off-by: Chris Zankel <chris@zankel.net>

3 files changed, 8 insertions, 1 deletions

diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c
index fe3834bc1dbf..f3e16efcd47a 100644
--- a/arch/xtensa/kernel/syscall.c
+++ b/arch/xtensa/kernel/syscall.c
@@ -93,3 +93,8 @@ asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg)
         return (long)ret;
 }
 
+asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len)
+{
+        return sys_fadvise64_64(fd, offset, len, advice);
+}
+
diff --git a/include/asm-xtensa/syscall.h b/include/asm-xtensa/syscall.h
index ea9b5132215e..05cebf8f62b1 100644
--- a/include/asm-xtensa/syscall.h
+++ b/include/asm-xtensa/syscall.h
@@ -28,6 +28,8 @@ asmlinkage long sys_rt_sigaction(int,
                                  struct sigaction __user *,
                                  size_t);
 asmlinkage long xtensa_shmat(int, char __user *, int);
+asmlinkage long xtensa_fadvise64_64(int, int,
+                                    unsigned long long, unsigned long long);
 
 /* Should probably move to linux/syscalls.h */
 struct pollfd;
diff --git a/include/asm-xtensa/unistd.h b/include/asm-xtensa/unistd.h
index bed04102407b..92968aabe34e 100644
--- a/include/asm-xtensa/unistd.h
+++ b/include/asm-xtensa/unistd.h
@@ -151,7 +151,7 @@ __SYSCALL( 61, sys_fcntl64, 3)
 #define __NR_available62                         62
 __SYSCALL( 62, sys_ni_syscall, 0)
 #define __NR_fadvise64_64                        63
-__SYSCALL( 63, sys_fadvise64_64, 6)
+__SYSCALL( 63, xtensa_fadvise64_64, 6)
 #define __NR_utime                               64     /* glibc 2.3.3 ?? */
 __SYSCALL( 64, sys_utime, 2)
 #define __NR_utimes                              65