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authorTejun Heo <tj@kernel.org>2013-10-24 19:49:07 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-30 02:12:06 +0400
commit56b3f3b884652395e1025a8e4f1c4bd47bc112c4 (patch)
tree8253438bdcaddafb5ce406828bd8b9073f215a7b /fs/sysfs/file.c
parent6fffcfa7c0fc438d3667b4eb2074d94f69c12c7b (diff)
downloadlinux-56b3f3b884652395e1025a8e4f1c4bd47bc112c4.tar.xz
sysfs: merge sysfs_elem_bin_attr into sysfs_elem_attr
3124eb1679 ("sysfs: merge regular and bin file handling") folded bin file handling into regular file handling. Among other things, bin file now shares the same open path including sysfs_open_dirent association using sysfs_dirent->s_attr.open. This is buggy because ->s_bin_attr lives in the same union and doesn't have the field. This bug doesn't trigger because sysfs_elem_bin_attr doesn't have an active field at the conflicting position. It does have a field "buffers" but it isn't used anymore. This patch collapses sysfs_elem_bin_attr into sysfs_elem_attr so that the bin_attr is accessed through ->s_attr.bin_attr which lives with ->s_attr.attr in an anonymous union. The code paths already assume bin_attr contains attr as the first element, so this doesn't add any more assumptions while making it explicit that the two types are handled together. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs/file.c')
-rw-r--r--fs/sysfs/file.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index c3795978b404..0d7368d43619 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -154,7 +154,7 @@ static ssize_t sysfs_bin_read(struct file *file, char __user *userbuf,
size_t bytes, loff_t *off)
{
struct sysfs_open_file *of = sysfs_of(file);
- struct bin_attribute *battr = of->sd->s_bin_attr.bin_attr;
+ struct bin_attribute *battr = of->sd->s_attr.bin_attr;
struct kobject *kobj = of->sd->s_parent->s_dir.kobj;
loff_t size = file_inode(file)->i_size;
int count = min_t(size_t, bytes, PAGE_SIZE);
@@ -236,7 +236,7 @@ static int flush_write_buffer(struct sysfs_open_file *of, char *buf, loff_t off,
}
if (sysfs_is_bin(of->sd)) {
- struct bin_attribute *battr = of->sd->s_bin_attr.bin_attr;
+ struct bin_attribute *battr = of->sd->s_attr.bin_attr;
rc = -EIO;
if (battr->write)
@@ -466,7 +466,7 @@ static const struct vm_operations_struct sysfs_bin_vm_ops = {
static int sysfs_bin_mmap(struct file *file, struct vm_area_struct *vma)
{
struct sysfs_open_file *of = sysfs_of(file);
- struct bin_attribute *battr = of->sd->s_bin_attr.bin_attr;
+ struct bin_attribute *battr = of->sd->s_attr.bin_attr;
struct kobject *kobj = of->sd->s_parent->s_dir.kobj;
int rc;
@@ -618,7 +618,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
return -ENODEV;
if (sysfs_is_bin(attr_sd)) {
- struct bin_attribute *battr = attr_sd->s_bin_attr.bin_attr;
+ struct bin_attribute *battr = attr_sd->s_attr.bin_attr;
has_read = battr->read || battr->mmap;
has_write = battr->write || battr->mmap;