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authorMichal Simek <michal.simek@xilinx.com>2013-08-13 16:00:53 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-20 08:43:02 -0700
commit4f01c72ef36d3305d6273fe7f1f6670c52745c3d (patch)
treeab71ffb7a755c453f84a2aaf37fe285d0bcdcd31 /include/linux
parent0dcf19b4fb41449de4d1f953f86aa6a90accdff5 (diff)
downloadvexpress-lsk-4f01c72ef36d3305d6273fe7f1f6670c52745c3d.tar.gz
microblaze: fix clone syscall
commit dfa9771a7c4784bafd0673bc7abcee3813088b77 upstream. Fix inadvertent breakage in the clone syscall ABI for Microblaze that was introduced in commit f3268edbe6fe ("microblaze: switch to generic fork/vfork/clone"). The Microblaze syscall ABI for clone takes the parent tid address in the 4th argument; the third argument slot is used for the stack size. The incorrectly-used CLONE_BACKWARDS type assigned parent tid to the 3rd slot. This commit restores the original ABI so that existing userspace libc code will work correctly. All kernel versions from v3.8-rc1 were affected. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/syscalls.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 4147d700a29..84662ecc7b5 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -802,9 +802,14 @@ asmlinkage long sys_vfork(void);
asmlinkage long sys_clone(unsigned long, unsigned long, int __user *, int,
int __user *);
#else
+#ifdef CONFIG_CLONE_BACKWARDS3
+asmlinkage long sys_clone(unsigned long, unsigned long, int, int __user *,
+ int __user *, int);
+#else
asmlinkage long sys_clone(unsigned long, unsigned long, int __user *,
int __user *, int);
#endif
+#endif
asmlinkage long sys_execve(const char __user *filename,
const char __user *const __user *argv,