diff options
| author | Christopher Yeoh <cyeoh@au1.ibm.com> | 2012-05-29 15:06:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-29 16:22:20 -0700 |
| commit | 5febcbe99d4766cc383909c447e002e63d8b4592 (patch) | |
| tree | dd2b87e923c982676ed07260ea7841a41098210a | |
| parent | eb6332a54542bcd3aedb121ecb247f172b8f3602 (diff) | |
Cross Memory Attach: make it Kconfigurable
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>
| -rw-r--r-- | mm/Kconfig | 10 | ||||
| -rw-r--r-- | mm/Makefile | 7 |
2 files changed, 15 insertions, 2 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 39220026c797..b2176374b98e 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -349,6 +349,16 @@ choice benefit. 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 # diff --git a/mm/Makefile b/mm/Makefile index ccecbf9818f5..a156285ce88d 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -5,8 +5,11 @@ mmu-y := nommu.o mmu-$(CONFIG_MMU) := fremap.o highmem.o madvise.o memory.o mincore.o \ mlock.o mmap.o mprotect.o mremap.o msync.o rmap.o \ - vmalloc.o pagewalk.o pgtable-generic.o \ - process_vm_access.o + vmalloc.o pagewalk.o pgtable-generic.o + +ifdef CONFIG_CROSS_MEMORY_ATTACH +mmu-$(CONFIG_MMU) += process_vm_access.o +endif obj-y := filemap.o mempool.o oom_kill.o fadvise.o \ maccess.o page_alloc.o page-writeback.o \ |