The patch titled
Subject: Cross Memory Attach: make it Kconfigurable
has been added to the -mm tree. Its filename is
cross-memory-attach-make-it-kconfigurable.patch
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------------------------------------------------------
From: Christopher Yeoh <cyeoh@xxxxxxxxxxx>
Subject: 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@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/Kconfig | 10 ++++++++++
mm/Makefile | 7 +++++--
2 files changed, 15 insertions(+), 2 deletions(-)
diff -puN mm/Kconfig~cross-memory-attach-make-it-kconfigurable mm/Kconfig
--- a/mm/Kconfig~cross-memory-attach-make-it-kconfigurable
+++ a/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 -puN mm/Makefile~cross-memory-attach-make-it-kconfigurable mm/Makefile
--- a/mm/Makefile~cross-memory-attach-make-it-kconfigurable
+++ a/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 \
_
Subject: Subject: Cross Memory Attach: make it Kconfigurable
Patches currently in -mm which might be from cyeoh@xxxxxxxxxxx are
cross-memory-attach-make-it-kconfigurable.patch
aio-vfs-cleanup-of-rw_copy_check_uvector-and-compat_rw_copy_check_uvector.patch
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