A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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mark struct file that had write access grabbed by open()

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new flag in ->f_mode - FMODE_WRITER.  Set by do_dentry_open() in case
when it has grabbed write access, checked by __fput() to decide whether
it wants to drop the sucker.  Allows to stop bothering with mnt_clone_write()
in alloc_file(), along with fewer special_file() checks.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2014-03-14 12:02:47 -04:00
commit 83f936c75e
4 changed files with 11 additions and 41 deletions
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4
fs/namespace.c
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@ -414,9 +414,7 @@ EXPORT_SYMBOL_GPL(mnt_clone_write);
*/
int __mnt_want_write_file(struct file *file)
{
struct inode *inode = file_inode(file);
if (!(file->f_mode & FMODE_WRITE) || special_file(inode->i_mode))
if (!(file->f_mode & FMODE_WRITER))
return __mnt_want_write(file->f_path.mnt);
else
return mnt_clone_write(file->f_path.mnt);