From f1a43f93f0f3bab418800eaccb9e2e3b5427e173 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Fri, 25 Jul 2008 01:48:07 -0700 Subject: ipc: use simple_read_from_buffer() Also this patch kills unneccesary trailing NULL character. Signed-off-by: Akinobu Mita Cc: Nadia Derbey Cc: Manfred Spraul Cc: Pierre Peiffer Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- ipc/mqueue.c | 25 +++++++------------------ 1 file changed, 7 insertions(+), 18 deletions(-) (limited to 'ipc/mqueue.c') diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 3e84b958186b..1fdc2eb2f6d8 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -314,15 +314,11 @@ static int mqueue_unlink(struct inode *dir, struct dentry *dentry) * through std routines) */ static ssize_t mqueue_read_file(struct file *filp, char __user *u_data, - size_t count, loff_t * off) + size_t count, loff_t *off) { struct mqueue_inode_info *info = MQUEUE_I(filp->f_path.dentry->d_inode); char buffer[FILENT_SIZE]; - size_t slen; - loff_t o; - - if (!count) - return 0; + ssize_t ret; spin_lock(&info->lock); snprintf(buffer, sizeof(buffer), @@ -335,21 +331,14 @@ static ssize_t mqueue_read_file(struct file *filp, char __user *u_data, pid_vnr(info->notify_owner)); spin_unlock(&info->lock); buffer[sizeof(buffer)-1] = '\0'; - slen = strlen(buffer)+1; - - o = *off; - if (o > slen) - return 0; - - if (o + count > slen) - count = slen - o; - if (copy_to_user(u_data, buffer + o, count)) - return -EFAULT; + ret = simple_read_from_buffer(u_data, count, off, buffer, + strlen(buffer)); + if (ret <= 0) + return ret; - *off = o + count; filp->f_path.dentry->d_inode->i_atime = filp->f_path.dentry->d_inode->i_ctime = CURRENT_TIME; - return count; + return ret; } static int mqueue_flush_file(struct file *filp, fl_owner_t id) -- cgit From 51cc50685a4275c6a02653670af9f108a64e01cf Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Fri, 25 Jul 2008 19:45:34 -0700 Subject: SL*B: drop kmem cache argument from constructor Kmem cache passed to constructor is only needed for constructors that are themselves multiplexeres. Nobody uses this "feature", nor does anybody uses passed kmem cache in non-trivial way, so pass only pointer to object. Non-trivial places are: arch/powerpc/mm/init_64.c arch/powerpc/mm/hugetlbpage.c This is flag day, yes. Signed-off-by: Alexey Dobriyan Acked-by: Pekka Enberg Acked-by: Christoph Lameter Cc: Jon Tollefson Cc: Nick Piggin Cc: Matt Mackall [akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c] [akpm@linux-foundation.org: fix mm/slab.c] [akpm@linux-foundation.org: fix ubifs] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- ipc/mqueue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'ipc/mqueue.c') diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 1fdc2eb2f6d8..474984f9e032 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -207,7 +207,7 @@ static int mqueue_get_sb(struct file_system_type *fs_type, return get_sb_single(fs_type, flags, data, mqueue_fill_super, mnt); } -static void init_once(struct kmem_cache *cachep, void *foo) +static void init_once(void *foo) { struct mqueue_inode_info *p = (struct mqueue_inode_info *) foo; -- cgit From f419a2e3b64def707e1384ee38abb77f99af5f6d Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 22 Jul 2008 00:07:17 -0400 Subject: [PATCH] kill nameidata passing to permission(), rename to inode_permission() Incidentally, the name that gives hundreds of false positives on grep is not a good idea... Signed-off-by: Al Viro --- ipc/mqueue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'ipc/mqueue.c') diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 474984f9e032..96fb36cd9874 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -638,7 +638,7 @@ static int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE, return ERR_PTR(-EINVAL); } - if (permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE], NULL)) { + if (inode_permission(dentry->d_inode, oflag2acc[oflag & O_ACCMODE])) { dput(dentry); mntput(mqueue_mnt); return ERR_PTR(-EACCES); -- cgit