diff options
author | Davidlohr Bueso <davidlohr.bueso@hp.com> | 2013-09-11 14:26:22 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-18 10:55:00 -0700 |
commit | dbb563ec7b143323dd31520ab08c08394bc13381 (patch) | |
tree | fb7a571302156850b43a37de15f0c2a8813259a9 | |
parent | 610a094ba321d59d1bae2535885f698c07a52daa (diff) |
ipc,shm: cleanup do_shmat pasta
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 <davidlohr.bueso@hp.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | ipc/shm.c | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index 81e5e7c0520e..d7b530afbd80 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -1115,16 +1115,21 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr, 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 *shmaddr, int shmflg, ulong *raddr, 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) |