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| author | Davidlohr Bueso <davidlohr.bueso@hp.com> | 2013-09-11 23:26:22 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 00:59:42 +0200 |
| commit | f42569b1388b1408b574a5e93a23a663647d4181 (patch) | |
| tree | cc3a37852d3ad59bfc76988d7c4b31973a468187 /ipc | |
| parent | ipc,shm: shorten critical region for shmctl (diff) | |
| download | linux-f42569b1388b1408b574a5e93a23a663647d4181.tar.xz linux-f42569b1388b1408b574a5e93a23a663647d4181.zip | |
ipc,shm: cleanup do_shmat pasta
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>
Diffstat (limited to 'ipc')
| -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 8ec381085dec..115dccebc63e 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -1108,16 +1108,21 @@ 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; @@ -1143,7 +1148,7 @@ 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; @@ -1167,19 +1172,12 @@ 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) |