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| author | Horst Hummel <horst.hummel@de.ibm.com> | 2005-09-04 00:57:58 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 09:06:26 +0200 |
| commit | c6eb7b7703ac4b3401b74f411c8c51ded214bf19 (patch) | |
| tree | 1cb3563cb83f80347dbc3e4bd30c4635d401e87a /drivers/s390/block/dasd_int.h | |
| parent | [PATCH] s390: debug feature changes (diff) | |
| download | linux-c6eb7b7703ac4b3401b74f411c8c51ded214bf19.tar.xz linux-c6eb7b7703ac4b3401b74f411c8c51ded214bf19.zip | |
[PATCH] s390: deadlock in dasd_devmap
Reintroduce a read-only copy of the devmap features in the device struct.
This is necessary to solve a deadlock on the dasd_devmap_lock which is
acquired by dasd_get_features called from the dasd tasklet. The current
implementation of devmap doesn't allow to call any devmap function from
interrupt or softirq context.
Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
| -rw-r--r-- | drivers/s390/block/dasd_int.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h index a9f38b235981..9fab04f3056d 100644 --- a/drivers/s390/block/dasd_int.h +++ b/drivers/s390/block/dasd_int.h @@ -6,7 +6,7 @@ * Bugreports.to..: <Linux390@de.ibm.com> * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 * - * $Revision: 1.64 $ + * $Revision: 1.65 $ */ #ifndef DASD_INT_H @@ -286,6 +286,7 @@ struct dasd_device { unsigned int bp_block; /* bytes per block */ unsigned int s2b_shift; /* log2 (bp_block/512) */ unsigned long flags; /* per device flags */ + unsigned short features; /* copy of devmap-features (read-only!) */ /* Device discipline stuff. */ struct dasd_discipline *discipline; |