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s390/mm: Fix crst upgrade of mmap with MAP_FIXED

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Right now the page table upgrade does not happen if the end address
of a fixed mapping is greater than TASK_SIZE.
Enhance s390_mmap_check() to handle MAP_FIXED mappings correctly.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2013-02-11 14:29:49 +01:00
committed by Martin Schwidefsky
parent a4e69245bd
commit 486c0a0bc8
2 changed files with 8 additions and 5 deletions
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4
arch/s390/include/asm/mman.h
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@@ -9,7 +9,7 @@
#include <uapi/asm/mman.h>
#if !defined(__ASSEMBLY__) && defined(CONFIG_64BIT)
int s390_mmap_check(unsigned long addr, unsigned long len);
#define arch_mmap_check(addr,len,flags) s390_mmap_check(addr,len)
int s390_mmap_check(unsigned long addr, unsigned long len, unsigned long flags);
#define arch_mmap_check(addr, len, flags) s390_mmap_check(addr, len, flags)
#endif
#endif /* __S390_MMAN_H__ */