X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fopen.c;h=317b7c7f38a73aac8cc8f3edc463919dabb2f947;hb=f6c2d1fa6310a71b1c2e05fc6d9ff9b91489fa0e;hp=c32c89d6d8dbed71f831e94f8aa0c67eade8cfc1;hpb=d62e54abca1146981fc9f98f85ff398a113a22c2;p=linux-2.6

diff --git a/fs/open.c b/fs/open.c
index c32c89d6d8..317b7c7f38 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
 
@@ -1093,22 +1099,31 @@ 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);
 
 #ifndef __alpha__