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authorAl Viro <viro@zeniv.linux.org.uk>2012-08-27 14:48:26 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-09-26 21:10:25 -0400
commitcb0942b81249798e15c3f04eee2946ef543e8115 (patch)
tree7d494c580a847342577661782c5173f76178aa81
parentcecb46f194460d23cacf3b13593f9f5a4f7a0fed (diff)
downloadvexpress-lsk-cb0942b81249798e15c3f04eee2946ef543e8115.tar.gz
make get_file() return its argument
simplifies a bunch of callers... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--arch/ia64/kernel/perfmon.c4
-rw-r--r--drivers/base/dma-buf.c3
-rw-r--r--drivers/staging/omapdrm/omap_gem.c3
-rw-r--r--drivers/tty/tty_io.c9
-rw-r--r--fs/autofs4/waitq.c3
-rw-r--r--fs/fuse/dev.c3
-rw-r--r--fs/nfsd/nfs4state.c3
-rw-r--r--fs/proc/base.c3
-rw-r--r--fs/select.c3
-rw-r--r--include/linux/fs.h6
-rw-r--r--mm/fremap.c3
-rw-r--r--mm/mmap.c3
-rw-r--r--mm/nommu.c6
-rw-r--r--net/compat.c3
-rw-r--r--net/core/scm.c3
-rw-r--r--security/selinux/hooks.c3
16 files changed, 23 insertions, 38 deletions
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 79826c13b8b..ff5d4e4c373 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2306,7 +2306,7 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t
* partially initialize the vma for the sampling buffer
*/
vma->vm_mm = mm;
- vma->vm_file = filp;
+ vma->vm_file = get_file(filp);
vma->vm_flags = VM_READ| VM_MAYREAD |VM_RESERVED;
vma->vm_page_prot = PAGE_READONLY; /* XXX may need to change */
@@ -2345,8 +2345,6 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct file *filp, pfm_context_t
goto error;
}
- get_file(filp);
-
/*
* now insert the vma in the vm list for the process, must be
* done with mmap lock held
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index c30f3e1d0ef..460e22dee36 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -460,8 +460,7 @@ int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma,
if (vma->vm_file)
fput(vma->vm_file);
- vma->vm_file = dmabuf->file;
- get_file(vma->vm_file);
+ vma->vm_file = get_file(dmabuf->file);
vma->vm_pgoff = pgoff;
diff --git a/drivers/staging/omapdrm/omap_gem.c b/drivers/staging/omapdrm/omap_gem.c
index 3a0d035a9e0..2a6bb7f9ee6 100644
--- a/drivers/staging/omapdrm/omap_gem.c
+++ b/drivers/staging/omapdrm/omap_gem.c
@@ -566,9 +566,8 @@ int omap_gem_mmap_obj(struct drm_gem_object *obj,
* in particular in the case of mmap'd dmabufs)
*/
fput(vma->vm_file);
- get_file(obj->filp);
vma->vm_pgoff = 0;
- vma->vm_file = obj->filp;
+ vma->vm_file = get_file(obj->filp);
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
}
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 71d95cfbabe..c7561f29d89 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1163,10 +1163,8 @@ ssize_t redirected_tty_write(struct file *file, const char __user *buf,
struct file *p = NULL;
spin_lock(&redirect_lock);
- if (redirect) {
- get_file(redirect);
- p = redirect;
- }
+ if (redirect)
+ p = get_file(redirect);
spin_unlock(&redirect_lock);
if (p) {
@@ -2246,8 +2244,7 @@ static int tioccons(struct file *file)
spin_unlock(&redirect_lock);
return -EBUSY;
}
- get_file(file);
- redirect = file;
+ redirect = get_file(file);
spin_unlock(&redirect_lock);
return 0;
}
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index da8876d38a7..dce436e595c 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -175,8 +175,7 @@ static void autofs4_notify_daemon(struct autofs_sb_info *sbi,
return;
}
- pipe = sbi->pipe;
- get_file(pipe);
+ pipe = get_file(sbi->pipe);
mutex_unlock(&sbi->wq_mutex);
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index f4246cfc8d8..8c23fa7a91e 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -148,8 +148,7 @@ static struct fuse_req *get_reserved_req(struct fuse_conn *fc,
if (ff->reserved_req) {
req = ff->reserved_req;
ff->reserved_req = NULL;
- get_file(file);
- req->stolen_file = file;
+ req->stolen_file = get_file(file);
}
spin_unlock(&fc->lock);
} while (!req);
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index cc894eda385..48a1bad3733 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2837,8 +2837,7 @@ static int nfs4_setlease(struct nfs4_delegation *dp, int flag)
return -ENOMEM;
}
fp->fi_lease = fl;
- fp->fi_deleg_file = fl->fl_file;
- get_file(fp->fi_deleg_file);
+ fp->fi_deleg_file = get_file(fl->fl_file);
atomic_set(&fp->fi_delegees, 1);
list_add(&dp->dl_perfile, &fp->fi_delegations);
return 0;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index b55c3bb298e..f1e8438d21b 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1979,8 +1979,7 @@ proc_map_files_readdir(struct file *filp, void *dirent, filldir_t filldir)
if (++pos <= filp->f_pos)
continue;
- get_file(vma->vm_file);
- info.file = vma->vm_file;
+ info.file = get_file(vma->vm_file);
info.len = snprintf(info.name,
sizeof(info.name), "%lx-%lx",
vma->vm_start, vma->vm_end);
diff --git a/fs/select.c b/fs/select.c
index db14c781335..ffdd16d6e69 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -220,8 +220,7 @@ static void __pollwait(struct file *filp, wait_queue_head_t *wait_address,
struct poll_table_entry *entry = poll_get_entry(pwq);
if (!entry)
return;
- get_file(filp);
- entry->filp = filp;
+ entry->filp = get_file(filp);
entry->wait_address = wait_address;
entry->key = p->_key;
init_waitqueue_func_entry(&entry->wait, pollwake);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index aa110476a95..de1db1c1208 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1074,7 +1074,11 @@ struct file_handle {
unsigned char f_handle[0];
};
-#define get_file(x) atomic_long_inc(&(x)->f_count)
+static inline struct file *get_file(struct file *f)
+{
+ atomic_long_inc(&f->f_count);
+ return f;
+}
#define fput_atomic(x) atomic_long_add_unless(&(x)->f_count, -1, 1)
#define file_count(x) atomic_long_read(&(x)->f_count)
diff --git a/mm/fremap.c b/mm/fremap.c
index 9ed4fd43246..048659c0c03 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -195,10 +195,9 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
*/
if (mapping_cap_account_dirty(mapping)) {
unsigned long addr;
- struct file *file = vma->vm_file;
+ struct file *file = get_file(vma->vm_file);
flags &= MAP_NONBLOCK;
- get_file(file);
addr = mmap_region(file, start, size,
flags, vma->vm_flags, pgoff);
fput(file);
diff --git a/mm/mmap.c b/mm/mmap.c
index ae18a48e7e4..872441e8191 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1301,8 +1301,7 @@ munmap_back:
goto free_vma;
correct_wcount = 1;
}
- vma->vm_file = file;
- get_file(file);
+ vma->vm_file = get_file(file);
error = file->f_op->mmap(file, vma);
if (error)
goto unmap_and_free_vma;
diff --git a/mm/nommu.c b/mm/nommu.c
index d4b0c10872d..dee2ff89fd5 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1282,10 +1282,8 @@ unsigned long do_mmap_pgoff(struct file *file,
vma->vm_pgoff = pgoff;
if (file) {
- region->vm_file = file;
- get_file(file);
- vma->vm_file = file;
- get_file(file);
+ region->vm_file = get_file(file);
+ vma->vm_file = get_file(file);
if (vm_flags & VM_EXECUTABLE) {
added_exe_file_vma(current->mm);
vma->vm_mm = current->mm;
diff --git a/net/compat.c b/net/compat.c
index 74ed1d7a84a..79ae8848500 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -301,8 +301,7 @@ void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
break;
}
/* Bump the usage count and install the file. */
- get_file(fp[i]);
- fd_install(new_fd, fp[i]);
+ fd_install(new_fd, get_file(fp[i]));
}
if (i > 0) {
diff --git a/net/core/scm.c b/net/core/scm.c
index 040cebeed45..b0098d25923 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -281,11 +281,10 @@ void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm)
break;
}
/* Bump the usage count and install the file. */
- get_file(fp[i]);
sock = sock_from_file(fp[i], &err);
if (sock)
sock_update_netprioidx(sock->sk, current);
- fd_install(new_fd, fp[i]);
+ fd_install(new_fd, get_file(fp[i]));
}
if (i > 0)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 4dfbcea10eb..651d8456611 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2135,8 +2135,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
if (!IS_ERR(devnull)) {
/* replace all the matching ones with this */
do {
- get_file(devnull);
- replace_fd(n - 1, devnull, 0);
+ replace_fd(n - 1, get_file(devnull), 0);
} while ((n = iterate_fd(files, n, match_file, cred)) != 0);
fput(devnull);
} else {