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staging: unisys: visorchannel: Describe spinlocks in VISORCHANNEL_Tag struct

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Add comments indicating the requirements and use of the insert_lock and
remove_lock in the VISORCHANNEL_Tag structure.

Signed-off-by: Bryan Thompson <bryan.thompson@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bryan Thompson
2014-12-05 17:09:24 -05:00
committed by Greg Kroah-Hartman
parent 4c67da3083
commit 9551bfba91
1 changed files with 4 additions and 3 deletions
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7
drivers/staging/unisys/visorchannel/visorchannel_funcs.c
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@@ -33,9 +33,10 @@ struct VISORCHANNEL_Tag {
struct channel_header chan_hdr;
uuid_le guid;
ulong size;
BOOL needs_lock;
spinlock_t insert_lock;
spinlock_t remove_lock;
BOOL needs_lock; /* channel creator knows if more than one
* thread will be inserting or removing */
spinlock_t insert_lock; /* protect head writes in chan_hdr */
spinlock_t remove_lock; /* protect tail writes in chan_hdr */
struct {
struct signal_queue_header req_queue;