Messages in this thread | | | Subject | Re: [PATCH v27 13/31] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 | From | "Yu, Yu-cheng" <> | Date | Fri, 21 May 2021 18:58:14 -0700 |
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On 5/21/2021 3:25 PM, Axel Rasmussen wrote: > This seems reasonable to me. The particular bit used isn't so > important from my perspective. I can't think of a way this would break > backward compatibility or such. So: > > Reviewed-by: Axel Rasmussen <axelrasmussen@google.com>
Thanks!
Yu-cheng
> > On Fri, May 21, 2021 at 3:13 PM Yu-cheng Yu <yu-cheng.yu@intel.com> wrote: >> >> To introduce VM_SHADOW_STACK as VM_HIGH_ARCH_BIT (37), and make all >> VM_HIGH_ARCH_BITs stay together, move VM_UFFD_MINOR_BIT from 37 to 38. >> >> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> >> Cc: Axel Rasmussen <axelrasmussen@google.com> >> Cc: Peter Xu <peterx@redhat.com> >> Cc: Mike Kravetz <mike.kravetz@oracle.com> >> --- >> include/linux/mm.h | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/include/linux/mm.h b/include/linux/mm.h >> index c274f75efcf9..923f89b9f1b5 100644 >> --- a/include/linux/mm.h >> +++ b/include/linux/mm.h >> @@ -373,7 +373,7 @@ extern unsigned int kobjsize(const void *objp); >> #endif >> >> #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_MINOR >> -# define VM_UFFD_MINOR_BIT 37 >> +# define VM_UFFD_MINOR_BIT 38 >> # define VM_UFFD_MINOR BIT(VM_UFFD_MINOR_BIT) /* UFFD minor faults */ >> #else /* !CONFIG_HAVE_ARCH_USERFAULTFD_MINOR */ >> # define VM_UFFD_MINOR VM_NONE >> -- >> 2.21.0 >>
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