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Cross Memory Attach: make it Kconfigurable

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Add a Kconfig option to allow people who don't want cross memory attach to
not have it included in their build.

Signed-off-by: Chris Yeoh <yeohc@au1.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christopher Yeoh 2012-05-29 15:06:27 -07:00 committed by Linus Torvalds
parent eb6332a545
commit 5febcbe99d
2 changed files with 15 additions and 2 deletions
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10
mm/Kconfig
View File

@ -349,6 +349,16 @@ choice
benefit. benefit.
endchoice endchoice
config CROSS_MEMORY_ATTACH
bool "Cross Memory Support"
depends on MMU
default y
help
Enabling this option adds the system calls process_vm_readv and
process_vm_writev which allow a process with the correct privileges
to directly read from or write to to another process's address space.
See the man page for more details.
# #
# UP and nommu archs use km based percpu allocator # UP and nommu archs use km based percpu allocator
# #

7
mm/Makefile
View File

@ -5,8 +5,11 @@
mmu-y := nommu.o mmu-y := nommu.o
mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \ mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \
mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \ mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \
vmalloc.o pagewalk.o pgtable-generic.o \ vmalloc.o pagewalk.o pgtable-generic.o
process_vm_access.o
ifdef CONFIG_CROSS_MEMORY_ATTACH
mmu-$(CONFIG_MMU) += process_vm_access.o
endif
obj-y := filemap.o mempool.o oom_kill.o fadvise.o \ obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
maccess.o page_alloc.o page-writeback.o \ maccess.o page_alloc.o page-writeback.o \