lkml.org 
[lkml]   [2019]   [Sep]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 11/14] software node: move small properties inline when copying
Date
When copying/duplicating set of properties, move smaller properties that
were stored separately directly inside property entry structures. We can
move:

- up to 8 bytes from U8 arrays
- up to 4 words
- up to 2 double words
- one U64 value
- one or 2 strings.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
drivers/base/swnode.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 83e2a706a86e..1aa6559993ec 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -277,6 +277,16 @@ static int property_entry_copy_data(struct property_entry *dst,
dst->value = src->value;
}

+ if (!dst->is_inline && dst->length <= sizeof(dst->value)) {
+ /* We have an opportunity to move the data inline */
+ const void *tmp = dst->pointer;
+
+ memcpy(&dst->value, tmp, dst->length);
+ dst->is_inline = true;
+
+ kfree(tmp);
+ }
+
dst->length = src->length;
dst->type = src->type;
dst->name = kstrdup(src->name, GFP_KERNEL);
--
2.23.0.162.g0b9fbb3734-goog
\
 
 \ /
  Last update: 2019-09-11 07:13    [W:0.054 / U:30.588 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site