The patch titled
Subject: arm64: provide pmdp_establish() helper
has been added to the -mm tree. Its filename is
arm64-provide-pmdp_establish-helper.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arm64-provide-pmdp_establish-helper.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arm64-provide-pmdp_establish-helper.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Catalin Marinas <catalin.marinas@xxxxxxx>
Subject: arm64: provide pmdp_establish() helper
We need an atomic way to setup pmd page table entry, avoiding races with
CPU setting dirty/accessed bits. This is required to implement
pmdp_invalidate() that doesn't lose these bits.
Link: http://lkml.kernel.org/r/20171213105756.69879-5-kirill.shutemov@xxxxxxxxxxxxxxx
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/pgtable.h | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN arch/arm64/include/asm/pgtable.h~arm64-provide-pmdp_establish-helper arch/arm64/include/asm/pgtable.h
--- a/arch/arm64/include/asm/pgtable.h~arm64-provide-pmdp_establish-helper
+++ a/arch/arm64/include/asm/pgtable.h
@@ -676,6 +676,13 @@ static inline void pmdp_set_wrprotect(st
{
ptep_set_wrprotect(mm, address, (pte_t *)pmdp);
}
+
+#define pmdp_establish pmdp_establish
+static inline pmd_t pmdp_establish(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp, pmd_t pmd)
+{
+ return __pmd(xchg_relaxed(&pmd_val(*pmdp), pmd_val(pmd)));
+}
#endif
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
_
Patches currently in -mm which might be from catalin.marinas@xxxxxxx are
arm64-provide-pmdp_establish-helper.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
