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-rw-r--r--fs/open.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/fs/open.c b/fs/open.c
index c32c89d..53ec28c 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -331,7 +331,10 @@ out:
asmlinkage long sys_ftruncate(unsigned int fd, unsigned long length)
{
- return do_sys_ftruncate(fd, length, 1);
+ long ret = do_sys_ftruncate(fd, length, 1);
+ /* avoid REGPARM breakage on x86: */
+ prevent_tail_call(ret);
+ return ret;
}
/* LFS versions of truncate are only needed on 32 bit machines */
@@ -343,7 +346,10 @@ asmlinkage long sys_truncate64(const char __user * path, loff_t length)
asmlinkage long sys_ftruncate64(unsigned int fd, loff_t length)
{
- return do_sys_ftruncate(fd, length, 0);
+ long ret = do_sys_ftruncate(fd, length, 0);
+ /* avoid REGPARM breakage on x86: */
+ prevent_tail_call(ret);
+ return ret;
}
#endif
@@ -1093,20 +1099,30 @@ long do_sys_open(int dfd, const char __user *filename, int flags, int mode)
asmlinkage long sys_open(const char __user *filename, int flags, int mode)
{
+ long ret;
+
if (force_o_largefile())
flags |= O_LARGEFILE;
- return do_sys_open(AT_FDCWD, filename, flags, mode);
+ ret = do_sys_open(AT_FDCWD, filename, flags, mode);
+ /* avoid REGPARM breakage on x86: */
+ prevent_tail_call(ret);
+ return ret;
}
EXPORT_SYMBOL_GPL(sys_open);
asmlinkage long sys_openat(int dfd, const char __user *filename, int flags,
int mode)
{
+ long ret;
+
if (force_o_largefile())
flags |= O_LARGEFILE;
- return do_sys_open(dfd, filename, flags, mode);
+ ret = do_sys_open(dfd, filename, flags, mode);
+ /* avoid REGPARM breakage on x86: */
+ prevent_tail_call(ret);
+ return ret;
}
EXPORT_SYMBOL_GPL(sys_openat);
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