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| H A D | namei.c | bd7c4b50 Wed Jan 08 19:37:23 CST 2020 Al Viro <viro@zeniv.linux.org.uk> handle_mounts(): start building a sane wrapper for follow_managed()
All callers of follow_managed() follow it on success with the same steps -
d_backing_inode(path->dentry) is calculated and stored into some struct inode *
variable and, in all but one case, an unsigned variable (nd->seq to be) is
zeroed. The single exception is lookup_fast() and there zeroing is correct
thing to do - not doing it is a pointless microoptimization.
Add a wrapper for follow_managed() that would do that combination.
It's mostly a vehicle for code massage - it will be changing quite a bit,
and the current calling conventions are by no means final. Right now it
takes path, nameidata and (as out params) inode and seq, similar to
__follow_mount_rcu(). Which will soon get folded into it...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
bd7c4b50 Wed Jan 08 19:37:23 CST 2020 Al Viro <viro@zeniv.linux.org.uk> handle_mounts(): start building a sane wrapper for follow_managed()
All callers of follow_managed() follow it on success with the same steps -
d_backing_inode(path->dentry) is calculated and stored into some struct inode *
variable and, in all but one case, an unsigned variable (nd->seq to be) is
zeroed. The single exception is lookup_fast() and there zeroing is correct
thing to do - not doing it is a pointless microoptimization.
Add a wrapper for follow_managed() that would do that combination.
It's mostly a vehicle for code massage - it will be changing quite a bit,
and the current calling conventions are by no means final. Right now it
takes path, nameidata and (as out params) inode and seq, similar to
__follow_mount_rcu(). Which will soon get folded into it...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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