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9p: Embed wait_queue_head into p9_req_t

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On a 64-bit system, the wait_queue_head_t is 24 bytes while the pointer
to it is 8 bytes.  Growing the p9_req_t by 16 bytes is better than
performing a 24-byte memory allocation.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox <[email protected]>
Reviewed-by: Greg Kurz <[email protected]>
Cc: Eric Van Hensbergen <[email protected]>
Cc: Ron Minnich <[email protected]>
Cc: Latchesar Ionkov <[email protected]>
Signed-off-by: Dominique Martinet <[email protected]>
This commit is contained in:
Matthew Wilcox 2018-07-11 14:02:23 -07:00 • committed by Dominique Martinet
commit 2557d0c57c
3 changed files with 7 additions and 16 deletions
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2
include/net/9p/client.h
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@ -113,7 +113,7 @@ enum p9_req_status_t {
struct p9_req_t {
int status;
int t_err;
wait_queue_head_t *wq;
wait_queue_head_t wq;
struct p9_fcall *tc;
struct p9_fcall *rc;
void *aux;