s390/dasd: Add defines for the Extended Address Volume track address

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The track address of an Extended Address Volume (more than 65520
cylinders) carries the high cylinder bits that do not fit the 16-bit cyl
field in the upper part of the head field. set_ch_t() open-codes the
corresponding shifts; name them so the encoding is explicit and can be
reused.

No functional change.

Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://patch.msgid.link/20260805111612.1285190-8-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Stefan Haberland 2026-08-05 13:16:00 +02:00 • committed by Jens Axboe

parent feea12d1cd

commit 1edac73fa2

2 changed files with 10 additions and 2 deletions

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4

drivers/s390/block/dasd_eckd.c

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8

drivers/s390/block/dasd_eckd.h

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