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mm: oom: deduplicate victim selection code for memcg and global oom
[cascardo/linux.git]
/
mm
/
mmap.c
diff --git
a/mm/mmap.c
b/mm/mmap.c
index
ca9d91b
..
7a0707a
100644
(file)
--- a/
mm/mmap.c
+++ b/
mm/mmap.c
@@
-88,6
+88,11
@@
static void unmap_region(struct mm_struct *mm,
* w: (no) no w: (no) no w: (copy) copy w: (no) no
* x: (no) no x: (no) yes x: (no) yes x: (yes) yes
*
* w: (no) no w: (no) no w: (copy) copy w: (no) no
* x: (no) no x: (no) yes x: (no) yes x: (yes) yes
*
+ * On arm64, PROT_EXEC has the following behaviour for both MAP_SHARED and
+ * MAP_PRIVATE:
+ * r: (no) no
+ * w: (no) no
+ * x: (yes) yes
*/
pgprot_t protection_map[16] = {
__P000, __P001, __P010, __P011, __P100, __P101, __P110, __P111,
*/
pgprot_t protection_map[16] = {
__P000, __P001, __P010, __P011, __P100, __P101, __P110, __P111,
@@
-3063,6
+3068,14
@@
out:
return ERR_PTR(ret);
}
return ERR_PTR(ret);
}
+bool vma_is_special_mapping(const struct vm_area_struct *vma,
+ const struct vm_special_mapping *sm)
+{
+ return vma->vm_private_data == sm &&
+ (vma->vm_ops == &special_mapping_vmops ||
+ vma->vm_ops == &legacy_special_mapping_vmops);
+}
+
/*
* Called with mm->mmap_sem held for writing.
* Insert a new vma covering the given region, with the given flags.
/*
* Called with mm->mmap_sem held for writing.
* Insert a new vma covering the given region, with the given flags.