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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-10-07 14:12:32 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-10-24 19:17:00 +0400 |
| commit | 127c1feffff8078400f01372712c600d0f9eef51 (patch) | |
| tree | 70c6b13e0b483459bf5e6669ac0973b35bab7c48 /arch/s390/include | |
| parent | 6cef30034c32ebe448c844089c4168c411feeb63 (diff) | |
| download | linux-127c1feffff8078400f01372712c600d0f9eef51.tar.xz | |
s390/mm: do not initialize storage keys
With dirty and referenced bits implemented in software it is unnecessary
to initialize the storage key for every page. With this patch not a single
storage key operation is done for a system that does not use KVM.
For KVM set_pte_at/pgste_set_key will do the initialization for the guest
view of the storage key when the mapping for the page is established in
the host.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/page.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index 1e51f2915b2e..316c8503a3b4 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -30,7 +30,12 @@ #include <asm/setup.h> #ifndef __ASSEMBLY__ -void storage_key_init_range(unsigned long start, unsigned long end); +static inline void storage_key_init_range(unsigned long start, unsigned long end) +{ +#if PAGE_DEFAULT_KEY + __storage_key_init_range(start, end); +#endif +} static inline void clear_page(void *page) { |