s390: Add support for DCACHE_WORD_ACCESS (again)

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Implement load_unaligned_zeropad() and enable DCACHE_WORD_ACCESS to
speed up string operations in fs/dcache.c and fs/namei.c.

With the secure storage access exception cases addressed, add support
for DCACHE_WORD_ACCESS again.

Tested-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Heiko Carstens 2026-07-20 10:58:34 +02:00 • committed by Vasily Gorbik

parent e462200886

commit 656db30220

4 changed files with 45 additions and 0 deletions

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1

arch/s390/Kconfig

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4

arch/s390/include/asm/asm-extable.h

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22

arch/s390/include/asm/word-at-a-time.h

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18

arch/s390/mm/extable.c

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