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authorLinus Torvalds <torvalds@linux-foundation.org>2014-10-13 11:28:42 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-13 11:28:42 +0200
commit77c688ac87183537ed0fb84ec2cb8fa8ec97c458 (patch)
treed18e117e05c0d71463823536165ddd9ad75b6bc5 /kernel
parent5e40d331bd72447197f26525f21711c4a265b6a6 (diff)
parenta457606a6f81cfddfc9da1ef2a8bf2c65a8eb35e (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro: "The big thing in this pile is Eric's unmount-on-rmdir series; we finally have everything we need for that. The final piece of prereqs is delayed mntput() - now filesystem shutdown always happens on shallow stack. Other than that, we have several new primitives for iov_iter (Matt Wilcox, culled from his XIP-related series) pushing the conversion to ->read_iter()/ ->write_iter() a bit more, a bunch of fs/dcache.c cleanups and fixes (including the external name refcounting, which gives consistent behaviour of d_move() wrt procfs symlinks for long and short names alike) and assorted cleanups and fixes all over the place. This is just the first pile; there's a lot of stuff from various people that ought to go in this window. Starting with unionmount/overlayfs mess... ;-/" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (60 commits) fs/file_table.c: Update alloc_file() comment vfs: Deduplicate code shared by xattr system calls operating on paths reiserfs: remove pointless forward declaration of struct nameidata don't need that forward declaration of struct nameidata in dcache.h anymore take dname_external() into fs/dcache.c let path_init() failures treated the same way as subsequent link_path_walk() fix misuses of f_count() in ppp and netlink ncpfs: use list_for_each_entry() for d_subdirs walk vfs: move getname() from callers to do_mount() gfs2_atomic_open(): skip lookups on hashed dentry [infiniband] remove pointless assignments gadgetfs: saner API for gadgetfs_create_file() f_fs: saner API for ffs_sb_create_file() jfs: don't hash direct inode [s390] remove pointless assignment of ->f_op in vmlogrdr ->open() ecryptfs: ->f_op is never NULL android: ->f_op is never NULL nouveau: __iomem misannotations missing annotation in fs/file.c fs: namespace: suppress 'may be used uninitialized' warnings ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/printk/printk.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 1ce770687ea8..7a6e69441f75 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -519,14 +519,13 @@ struct devkmsg_user {
char buf[8192];
};
-static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
- unsigned long count, loff_t pos)
+static ssize_t devkmsg_write(struct kiocb *iocb, struct iov_iter *from)
{
char *buf, *line;
int i;
int level = default_message_loglevel;
int facility = 1; /* LOG_USER */
- size_t len = iov_length(iv, count);
+ size_t len = iocb->ki_nbytes;
ssize_t ret = len;
if (len > LOG_LINE_MAX)
@@ -535,13 +534,10 @@ static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
if (buf == NULL)
return -ENOMEM;
- line = buf;
- for (i = 0; i < count; i++) {
- if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len)) {
- ret = -EFAULT;
- goto out;
- }
- line += iv[i].iov_len;
+ buf[len] = '\0';
+ if (copy_from_iter(buf, len, from) != len) {
+ kfree(buf);
+ return -EFAULT;
}
/*
@@ -567,10 +563,8 @@ static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
line = endp;
}
}
- line[len] = '\0';
printk_emit(facility, level, NULL, 0, "%s", line);
-out:
kfree(buf);
return ret;
}
@@ -802,7 +796,7 @@ static int devkmsg_release(struct inode *inode, struct file *file)
const struct file_operations kmsg_fops = {
.open = devkmsg_open,
.read = devkmsg_read,
- .aio_write = devkmsg_writev,
+ .write_iter = devkmsg_write,
.llseek = devkmsg_llseek,
.poll = devkmsg_poll,
.release = devkmsg_release,