The patch titled
Subject: mm/vmalloc: reparate put pages and flush VM flags
has been added to the -mm tree. Its filename is
mm-vmalloc-separate-put-pages-and-flush-vm-flags.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-vmalloc-separate-put-pages-and-flush-vm-flags.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmalloc-separate-put-pages-and-flush-vm-flags.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/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Subject: mm/vmalloc: reparate put pages and flush VM flags
When VM_MAP_PUT_PAGES was added, it was defined with the same value as
VM_FLUSH_RESET_PERMS. This doesn't seem like it will cause any big
functional problems other than some excess flushing for VM_MAP_PUT_PAGES
allocations.
Redefine VM_MAP_PUT_PAGES to have its own value. Also, move the comment
and remove whitespace for VM_KASAN such that the flags lower down are less
likely to be missed in the future.
Link: https://lkml.kernel.org/r/20210121014118.31922-1-rick.p.edgecombe@xxxxxxxxx
Fixes: b944afc9d64d ("mm: add a VM_MAP_PUT_PAGES flag for vmap")
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Reviewed-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Daniel Axtens <dja@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/vmalloc.h | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/include/linux/vmalloc.h~mm-vmalloc-separate-put-pages-and-flush-vm-flags
+++ a/include/linux/vmalloc.h
@@ -23,9 +23,6 @@ struct notifier_block; /* in notifier.h
#define VM_DMA_COHERENT 0x00000010 /* dma_alloc_coherent */
#define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */
#define VM_NO_GUARD 0x00000040 /* don't add guard page */
-#define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */
-#define VM_MAP_PUT_PAGES 0x00000100 /* put pages and free array in vfree */
-
/*
* VM_KASAN is used slighly differently depending on CONFIG_KASAN_VMALLOC.
*
@@ -36,12 +33,13 @@ struct notifier_block; /* in notifier.h
* Otherwise, VM_KASAN is set for kasan_module_alloc() allocations and used to
* determine which allocations need the module shadow freed.
*/
-
+#define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */
/*
* Memory with VM_FLUSH_RESET_PERMS cannot be freed in an interrupt or with
* vfree_atomic().
*/
#define VM_FLUSH_RESET_PERMS 0x00000100 /* Reset direct map and flush TLB on unmap */
+#define VM_MAP_PUT_PAGES 0x00000200 /* put pages and free array in vfree */
/* bits [20..32] reserved for arch specific ioremap internals */
_
Patches currently in -mm which might be from rick.p.edgecombe@xxxxxxxxx are
mm-vmalloc-separate-put-pages-and-flush-vm-flags.patch
