From 504499f22c08a03e2e19dc88d31aa0ecd2ac815e Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Thu, 9 Dec 2010 19:29:08 -0800
Subject: [PATCH] HID: simplify an index check in hid_lookup_collection
Save the struct hid_collection * in a temporary to shorten
the generated code a bit and perhaps improve readability.
$ size drivers/hid/hid-core.o*
text data bss dec hex filename
16460 78 8 16546 40a2 drivers/hid/hid-core.o.new
16469 78 8 16555 40ab drivers/hid/hid-core.o.old
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
drivers/hid/hid-core.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 86b7155632fb..d4c1906313d2 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -178,10 +178,14 @@ static int close_collection(struct hid_parser *parser)
static unsigned hid_lookup_collection(struct hid_parser *parser, unsigned type)
{
+ struct hid_collection *collection = parser->device->collection;
int n;
- for (n = parser->collection_stack_ptr - 1; n >= 0; n--)
- if (parser->device->collection[parser->collection_stack[n]].type == type)
- return parser->device->collection[parser->collection_stack[n]].usage;
+
+ for (n = parser->collection_stack_ptr - 1; n >= 0; n--) {
+ unsigned index = parser->collection_stack[n];
+ if (collection[index].type == type)
+ return collection[index].usage;
+ }
return 0; /* we know nothing about this usage type */
}
--
GitLab