3.11-stable review patch. If anyone has any objections, please let me know.
------------------ From: Davidlohr Bueso <[email protected]> commit f42569b1388b1408b574a5e93a23a663647d4181 upstream. Clean up some of the messy do_shmat() spaghetti code, getting rid of out_free and out_put_dentry labels. This makes shortening the critical region of this function in the next patch a little easier to do and read. Signed-off-by: Davidlohr Bueso <[email protected]> Tested-by: Sedat Dilek <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Manfred Spraul <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Cc: Mike Galbraith <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- ipc/shm.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) --- a/ipc/shm.c +++ b/ipc/shm.c @@ -1115,16 +1115,21 @@ long do_shmat(int shmid, char __user *sh err = -ENOMEM; sfd = kzalloc(sizeof(*sfd), GFP_KERNEL); - if (!sfd) - goto out_put_dentry; + if (!sfd) { + path_put(&path); + goto out_nattch; + } file = alloc_file(&path, f_mode, is_file_hugepages(shp->shm_file) ? &shm_file_operations_huge : &shm_file_operations); err = PTR_ERR(file); - if (IS_ERR(file)) - goto out_free; + if (IS_ERR(file)) { + kfree(sfd); + path_put(&path); + goto out_nattch; + } file->private_data = sfd; file->f_mapping = shp->shm_file->f_mapping; @@ -1150,7 +1155,7 @@ long do_shmat(int shmid, char __user *sh addr > current->mm->start_stack - size - PAGE_SIZE * 5) goto invalid; } - + addr = do_mmap_pgoff(file, addr, size, prot, flags, 0, &populate); *raddr = addr; err = 0; @@ -1174,19 +1179,12 @@ out_nattch: else shm_unlock(shp); up_write(&shm_ids(ns).rw_mutex); - -out: return err; out_unlock: shm_unlock(shp); - goto out; - -out_free: - kfree(sfd); -out_put_dentry: - path_put(&path); - goto out_nattch; +out: + return err; } SYSCALL_DEFINE3(shmat, int, shmid, char __user *, shmaddr, int, shmflg) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
