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H A D | mmap.c | diff 4e99b02131b280b064d30a5926ef1c4763f3097b Wed Nov 13 00:07:54 CET 2013 Heiko Carstens <heiko.carstens@de.ibm.com> mmap: arch_get_unmapped_area(): use proper mmap base for bottom up direction
This is more or less the generic variant of commit 41aacc1eea64 ("x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member").
So effectively architectures which use an own arch_pick_mmap_layout() implementation but call the generic arch_get_unmapped_area() now can also randomize their mmap_base.
All architectures which have an own arch_pick_mmap_layout() and call the generic arch_get_unmapped_area() (arm64, s390, tile) currently set mmap_base to TASK_UNMAPPED_BASE. This is also true for the generic arch_pick_mmap_layout() function. So this change is a no-op currently.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Radu Caragea <sinaelgl@gmail.com> Cc: Michel Lespinasse <walken@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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