Re: [RFC v5 34/38] procfs: display the protection-key number associated with a vma

On Mon, Jul 10, 2017 at 08:37:28AM +0530, Anshuman Khandual wrote:

On 07/06/2017 02:52 AM, Ram Pai wrote:

quoted

Display the pkey number associated with the vma in smaps of a task.
The key will be seen as below:

ProtectionKey: 0

Signed-off-by: Ram Pai <redacted>
---
 arch/powerpc/kernel/setup_64.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index f35ff9d..ebc82b3 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c

@@ -37,6 +37,7 @@
 #include <linux/memblock.h>
 #include <linux/memory.h>
 #include <linux/nmi.h>
+#include <linux/pkeys.h>
 
 #include <asm/io.h>
 #include <asm/kdump.h>

@@ -745,3 +746,10 @@ static int __init disable_hardlockup_detector(void)
 }
 early_initcall(disable_hardlockup_detector);
 #endif
+
+#ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS

Why not for X86 protection keys ?

hmm.. I dont understand the comment.


-- 
Ram Pai