The quilt patch titled
Subject: mm: refactor va_remove_mappings
has been removed from the -mm tree. Its filename was
mm-refactor-va_remove_mappings.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: mm: refactor va_remove_mappings
Date: Sat, 21 Jan 2023 08:10:51 +0100
Move the VM_FLUSH_RESET_PERMS to the caller and rename the function to
better describe what it is doing.
Link: https://lkml.kernel.org/r/20230121071051.1143058-11-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/vmalloc.c~mm-refactor-va_remove_mappings
+++ a/mm/vmalloc.c
@@ -2602,35 +2602,23 @@ static inline void set_area_direct_map(c
set_direct_map(area->pages[i]);
}
-/* Handle removing and resetting vm mappings related to the vm_struct. */
-static void vm_remove_mappings(struct vm_struct *area, int deallocate_pages)
+/*
+ * Flush the vm mapping and reset the direct map.
+ */
+static void vm_reset_perms(struct vm_struct *area)
{
unsigned long start = ULONG_MAX, end = 0;
unsigned int page_order = vm_area_page_order(area);
- int flush_reset = area->flags & VM_FLUSH_RESET_PERMS;
int flush_dmap = 0;
int i;
- /* If this is not VM_FLUSH_RESET_PERMS memory, no need for the below. */
- if (!flush_reset)
- return;
-
/*
- * If not deallocating pages, just do the flush of the VM area and
- * return.
- */
- if (!deallocate_pages) {
- vm_unmap_aliases();
- return;
- }
-
- /*
- * If execution gets here, flush the vm mapping and reset the direct
- * map. Find the start and end range of the direct mappings to make sure
+ * Find the start and end range of the direct mappings to make sure that
* the vm_unmap_aliases() flush includes the direct map.
*/
for (i = 0; i < area->nr_pages; i += 1U << page_order) {
unsigned long addr = (unsigned long)page_address(area->pages[i]);
+
if (addr) {
unsigned long page_size;
@@ -2725,7 +2713,8 @@ void vfree(const void *addr)
return;
}
- vm_remove_mappings(vm, true);
+ if (unlikely(vm->flags & VM_FLUSH_RESET_PERMS))
+ vm_reset_perms(vm);
for (i = 0; i < vm->nr_pages; i++) {
struct page *page = vm->pages[i];
_
Patches currently in -mm which might be from hch@xxxxxx are
