From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f182.google.com (mail-pf0-f182.google.com [209.85.192.182]) by kanga.kvack.org (Postfix) with ESMTP id 020EB82F60 for ; Sun, 20 Mar 2016 14:47:06 -0400 (EDT) Received: by mail-pf0-f182.google.com with SMTP id n5so237533087pfn.2 for ; Sun, 20 Mar 2016 11:47:05 -0700 (PDT) Received: from mga11.intel.com (mga11.intel.com. [192.55.52.93]) by mx.google.com with ESMTP id hc1si9272707pac.16.2016.03.20.11.41.46 for ; Sun, 20 Mar 2016 11:41:47 -0700 (PDT) From: "Kirill A. Shutemov" Subject: [PATCH 30/71] efivarfs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros Date: Sun, 20 Mar 2016 21:40:37 +0300 Message-Id: <1458499278-1516-31-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1458499278-1516-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1458499278-1516-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton , Alexander Viro , Linus Torvalds Cc: Christoph Lameter , Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Kirill A. Shutemov" , Matthew Garrett , Jeremy Kerr , Matt Fleming PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); Signed-off-by: Kirill A. Shutemov Cc: Matthew Garrett Cc: Jeremy Kerr Cc: Matt Fleming --- fs/efivarfs/super.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index dd029d13ea61..553c5d2db4a4 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -197,8 +197,8 @@ static int efivarfs_fill_super(struct super_block *sb, void *data, int silent) efivarfs_sb = sb; sb->s_maxbytes = MAX_LFS_FILESIZE; - sb->s_blocksize = PAGE_CACHE_SIZE; - sb->s_blocksize_bits = PAGE_CACHE_SHIFT; + sb->s_blocksize = PAGE_SIZE; + sb->s_blocksize_bits = PAGE_SHIFT; sb->s_magic = EFIVARFS_MAGIC; sb->s_op = &efivarfs_ops; sb->s_d_op = &efivarfs_d_ops; -- 2.7.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org