diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2012-06-01 01:26:18 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-06-01 02:49:29 +0200 |
| commit | af5e6171437c9d62d84459b24877c94c23782676 (patch) | |
| tree | 06ee8cef7f47a0f4facd84f7676c39001965e549 | |
| parent | proc: don't do dummy rcu_read_lock/rcu_read_unlock on error path (diff) | |
| download | linux-af5e6171437c9d62d84459b24877c94c23782676.tar.xz linux-af5e6171437c9d62d84459b24877c94c23782676.zip | |
proc: pass "fd" by value in /proc/*/{fd,fdinfo} code
Pass "fd" directly, not via pointer -- one less memory read.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/proc/base.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index 0f928cbba4a4..bd8b4ca6a610 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1848,7 +1848,7 @@ static const struct dentry_operations tid_fd_dentry_operations = static struct dentry *proc_fd_instantiate(struct inode *dir, struct dentry *dentry, struct task_struct *task, const void *ptr) { - unsigned fd = *(const unsigned *)ptr; + unsigned fd = (unsigned long)ptr; struct inode *inode; struct proc_inode *ei; struct dentry *error = ERR_PTR(-ENOENT); @@ -1885,7 +1885,7 @@ static struct dentry *proc_lookupfd_common(struct inode *dir, if (fd == ~0U) goto out; - result = instantiate(dir, dentry, task, &fd); + result = instantiate(dir, dentry, task, (void *)(unsigned long)fd); out: put_task_struct(task); out_no_task: @@ -1937,7 +1937,7 @@ static int proc_readfd_common(struct file * filp, void * dirent, len = snprintf(name, sizeof(name), "%d", fd); rv = proc_fill_cache(filp, dirent, filldir, name, len, instantiate, p, - &fd); + (void *)(unsigned long)fd); if (rv < 0) goto out_fd_loop; rcu_read_lock(); @@ -2353,7 +2353,7 @@ static const struct inode_operations proc_fd_inode_operations = { static struct dentry *proc_fdinfo_instantiate(struct inode *dir, struct dentry *dentry, struct task_struct *task, const void *ptr) { - unsigned fd = *(unsigned *)ptr; + unsigned fd = (unsigned long)ptr; struct inode *inode; struct proc_inode *ei; struct dentry *error = ERR_PTR(-ENOENT); |