Messages in this thread | | | Date | Fri, 8 Jan 2016 20:40:31 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH 30/31] x86, pkeys: create an x86 arch_calc_vm_prot_bits() for VMA flags |
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On Wed, 6 Jan 2016, Dave Hansen wrote:
> > From: Dave Hansen <dave.hansen@linux.intel.com> > > calc_vm_prot_bits() takes PROT_{READ,WRITE,EXECUTE} bits and > turns them in to the vma->vm_flags/VM_* bits. We need to do a > similar thing for protection keys. > > We take a protection key (4 bits) and encode it in to the 4 > VM_PKEY_* bits. > > Note: this code is not new. It was simply a part of the > mprotect_pkey() patch in the past. I broke it out for use > in the execute-only support. > > Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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