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Remove TQ_SLEEP -> KM_SLEEP mapping

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When the taskq code was originally written it seemed like a good
idea to simply map TQ_SLEEP to KM_SLEEP.  Unfortunately, this
assumed that the TQ_* flags would never confict with any of the
Linux GFP_* flags.  When adding the TQ_PUSHPAGE support in commit
cd5ca4b this invariant was accidentally broken.

Therefore to support TQ_PUSHPAGE, which is needed for Linux, and
prevent any further confusion I have removed this direct mapping.
The TQ_SLEEP, TQ_NOSLEEP, and TQ_PUSHPAGE are no longer defined
in terms of their KM_* counterparts.  Instead a simple mapping
function is introduce to convert TQ_* -> KM_* where needed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #171
This commit is contained in:
Brian Behlendorf
2012-09-12 11:31:39 -07:00
parent 330fe010e4
commit 9b51f21841
2 changed files with 19 additions and 16 deletions
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include/sys/taskq.h
+3 -2
View File
@@ -60,8 +60,9 @@ typedef struct taskq_ent {
* KM_SLEEP/KM_NOSLEEP. TQ_NOQUEUE/TQ_NOALLOC are set particularly
* large so as not to conflict with already used GFP_* defines.
*/
#define TQ_SLEEP KM_SLEEP
#define TQ_NOSLEEP KM_NOSLEEP
#define TQ_SLEEP 0x00000000
#define TQ_NOSLEEP 0x00000001
#define TQ_PUSHPAGE 0x00000002
#define TQ_NOQUEUE 0x01000000
#define TQ_NOALLOC 0x02000000
#define TQ_NEW 0x04000000