proc: rearrange args
Rearrange args for smaller code.
lookup revolves around memcmp() which gets len 3rd arg, so propagate
length as 3rd arg.
readdir and lookup add additional arg to VFS ->readdir and ->lookup, so
better add it to the end.
Space savings on x86_64:
add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-18 (-18)
Function old new delta
proc_readdir 22 13 -9
proc_lookup 18 9 -9
proc_match() is smaller if not inlined, I promise!
Link: http://lkml.kernel.org/r/20180104175958.GB5204@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index a2bf369..68c06ae 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -135,7 +135,7 @@ static struct dentry *proc_tgid_net_lookup(struct inode *dir,
de = ERR_PTR(-ENOENT);
net = get_proc_task_net(dir);
if (net != NULL) {
- de = proc_lookup_de(net->proc_net, dir, dentry);
+ de = proc_lookup_de(dir, dentry, net->proc_net);
put_net(net);
}
return de;
@@ -172,7 +172,7 @@ static int proc_tgid_net_readdir(struct file *file, struct dir_context *ctx)
ret = -EINVAL;
net = get_proc_task_net(file_inode(file));
if (net != NULL) {
- ret = proc_readdir_de(net->proc_net, file, ctx);
+ ret = proc_readdir_de(file, ctx, net->proc_net);
put_net(net);
}
return ret;