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Date: Mon, 23 Apr 2012 13:42:43 +0930 From: Christopher Yeoh <cyeoh@....ibm.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org Subject: [PATCH] Adds Kconfig option for Cross Memory Attach Hi Andrew, Attached is a patch which you asked for a while back which adds a Kconfig option to allow people who don't want cross memory attach to not have it included in their build. Regards, Chris -- cyeoh@...ibm.com Signed-off-by: Chris Yeoh <yeohc@....ibm.com> Kconfig | 11 +++++++++++ Makefile | 7 +++++-- 2 files changed, 16 insertions(+), 2 deletions(-) diff --git a/mm/Kconfig b/mm/Kconfig index e338407..7619f90 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -379,3 +379,14 @@ config CLEANCACHE in a negligible performance hit. If unsure, say Y to enable cleancache + +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. + diff --git a/mm/Makefile b/mm/Makefile index 50ec00e..1ddd00f 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 \ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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