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authorMichael Holzheu <holzheu@de.ibm.com>2007-08-10 14:32:33 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-08-10 14:32:38 +0200
commit4eac34529bce2b4cca9be90a6903c965baa8193c (patch)
tree2a0d04aa4ed5b9c2d9a75158c6c0715456443e5f /drivers/s390/char/vmur.h
parentf2405598e0678e9c93dd780f2a12fc562ece3d13 (diff)
[S390] vmur: add "top of queue" sanity check for reader open
If the z/VM reader is already open, it can happen that after opening the Linux reader device, not the topmost file is processed. According the semantics of the Linux z/VM unit record device driver, always the topmost file has to be processed. With this fix an error is returned if that is not the case. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/vmur.h')
-rw-r--r--drivers/s390/char/vmur.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/char/vmur.h b/drivers/s390/char/vmur.h
index 522a9dfaa275..2b3c564e0472 100644
--- a/drivers/s390/char/vmur.h
+++ b/drivers/s390/char/vmur.h
@@ -53,6 +53,7 @@ struct file_control_block {
#define FLG_SYSTEM_HOLD 0x04
#define FLG_CP_DUMP 0x10
#define FLG_USER_HOLD 0x20
+#define FLG_IN_USE 0x80
/*
* A struct urdev is created for each ur device that is made available