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[S390] store indication fault optimization

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Use the store indication bit in the translation exception code on
page faults to avoid the protection faults that immediatly follow
the page fault if the access has been a write.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2010-10-25 16:10:13 +02:00
committed by Martin Schwidefsky
parent 6931be0803
commit 92f842eac7
3 changed files with 20 additions and 3 deletions
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1
arch/s390/include/asm/pgtable.h
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@@ -38,6 +38,7 @@
extern pgd_t swapper_pg_dir[] __attribute__ ((aligned (4096)));
extern void paging_init(void);
extern void vmem_map_init(void);
extern void fault_init(void);
/*
* The S390 doesn't have any external MMU info: the kernel page