diff options
Diffstat (limited to 'arch/s390/include/asm/kasan.h')
| -rw-r--r-- | arch/s390/include/asm/kasan.h | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h index 2768d5db181f..e5cfc81d5b61 100644 --- a/arch/s390/include/asm/kasan.h +++ b/arch/s390/include/asm/kasan.h @@ -14,17 +14,15 @@ #define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE) extern void kasan_early_init(void); -extern void kasan_copy_shadow_mapping(void); -extern void kasan_free_early_identity(void); /* * Estimate kasan memory requirements, which it will reserve * at the very end of available physical memory. To estimate * that, we take into account that kasan would require * 1/8 of available physical memory (for shadow memory) + - * creating page tables for the whole memory + shadow memory - * region (1 + 1/8). To keep page tables estimates simple take - * the double of combined ptes size. + * creating page tables for the shadow memory region. + * To keep page tables estimates simple take the double of + * combined ptes size. * * physmem parameter has to be already adjusted if not entire physical memory * would be used (e.g. due to effect of "mem=" option). @@ -36,15 +34,13 @@ static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem) /* for shadow memory */ kasan_needs = round_up(physmem / 8, PAGE_SIZE); /* for paging structures */ - pages = DIV_ROUND_UP(physmem + kasan_needs, PAGE_SIZE); + pages = DIV_ROUND_UP(kasan_needs, PAGE_SIZE); kasan_needs += DIV_ROUND_UP(pages, _PAGE_ENTRIES) * _PAGE_TABLE_SIZE * 2; return kasan_needs; } #else static inline void kasan_early_init(void) { } -static inline void kasan_copy_shadow_mapping(void) { } -static inline void kasan_free_early_identity(void) { } static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem) { return 0; } #endif |