linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
From: Rick Edgecombe <rick.p.edgecombe@intel.com>
To: akpm@linux-foundation.org
Cc: hch@lst.de, dja@axtens.net, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org,
	Rick Edgecombe <rick.p.edgecombe@intel.com>
Subject: [PATCH] mm/vmalloc: Separate put pages and flush VM flags
Date: Wed, 20 Jan 2021 17:41:18 -0800	[thread overview]
Message-ID: <20210121014118.31922-1-rick.p.edgecombe@intel.com> (raw)

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.

Fixes: b944afc9d64d ("mm: add a VM_MAP_PUT_PAGES flag for vmap")
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
---
 include/linux/vmalloc.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 80c0181c411d..0b3dd135aa5d 100644
--- a/include/linux/vmalloc.h
+++ b/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 */
 
-- 
2.20.1



             reply	other threads:[~2021-01-21  1:42 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-21  1:41 Rick Edgecombe [this message]
2021-01-21  2:44 ` Miaohe Lin
2021-01-21  7:08 ` Christoph Hellwig
2021-01-21 13:19 ` Matthew Wilcox
2021-01-21 23:57   ` Edgecombe, Rick P

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210121014118.31922-1-rick.p.edgecombe@intel.com \
    --to=rick.p.edgecombe@intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=dja@axtens.net \
    --cc=hch@lst.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox