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authorStefan Weinhuber <wein@de.ibm.com>2009-03-26 15:23:47 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-03-26 15:24:05 +0100
commitb44b0ab3bac16356f03e94b1b49ba9305710c445 (patch)
tree66dfc19e2164a6a30d19b958ccf4e4a5d210c8d8 /arch/s390/include/asm/dasd.h
parentf9a28f7bc5225af476f8d4bb669038da8801b7c4 (diff)
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op-kernel-dev-b44b0ab3bac16356f03e94b1b49ba9305710c445.tar.gz
[S390] dasd: add large volume support
The dasd device driver will now support ECKD devices with more then 65520 cylinders. In the traditional ECKD adressing scheme each track is addressed by a 16-bit cylinder and 16-bit head number. The new addressing scheme makes use of the fact that the actual number of heads is never larger then 15, so 12 bits of the head number can be redefined to be part of the cylinder address. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/dasd.h')
-rw-r--r--arch/s390/include/asm/dasd.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/s390/include/asm/dasd.h b/arch/s390/include/asm/dasd.h
index e2db6f1..218bce8 100644
--- a/arch/s390/include/asm/dasd.h
+++ b/arch/s390/include/asm/dasd.h
@@ -162,15 +162,15 @@ typedef struct dasd_profile_info_t {
unsigned int dasd_io_nr_req[32]; /* histogram of # of requests in chanq */
} dasd_profile_info_t;
-/*
+/*
* struct format_data_t
* represents all data necessary to format a dasd
*/
typedef struct format_data_t {
- int start_unit; /* from track */
- int stop_unit; /* to track */
- int blksize; /* sectorsize */
- int intensity;
+ unsigned int start_unit; /* from track */
+ unsigned int stop_unit; /* to track */
+ unsigned int blksize; /* sectorsize */
+ unsigned int intensity;
} format_data_t;
/*
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