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s390/kasan: free early identity mapping structures

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Kasan initialization code is changed to populate persistent shadow
first, save allocator position into pgalloc_freeable and proceed with
early identity mapping creation. This way early identity mapping paging
structures could be freed at once after switching to swapper_pg_dir
when early identity mapping is not needed anymore.

Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik
2017-11-20 12:56:10 +01:00
committed by Martin Schwidefsky
parent 5e78596329
commit 135ff16393
3 changed files with 13 additions and 2 deletions
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2
arch/s390/include/asm/kasan.h
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@@ -15,9 +15,11 @@
extern void kasan_early_init(void);
extern void kasan_copy_shadow(pgd_t *dst);
extern void kasan_free_early_identity(void);
#else
static inline void kasan_early_init(void) { }
static inline void kasan_copy_shadow(pgd_t *dst) { }
static inline void kasan_free_early_identity(void) { }
#endif
#endif