From: jglisse@redhat.com To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org, "Jérôme Glisse" <jglisse@redhat.com>, "Andrew Morton" <akpm@linux-foundation.org>, "Alexander Viro" <viro@zeniv.linux.org.uk>, "Tejun Heo" <tj@kernel.org>, "Jan Kara" <jack@suse.cz>, "Josef Bacik" <jbacik@fb.com>, "Mel Gorman" <mgorman@techsingularity.net> Subject: [RFC PATCH 07/79] mm/page: add helpers to find mapping give a page and buffer head Date: Wed, 4 Apr 2018 15:17:54 -0400 [thread overview] Message-ID: <20180404191831.5378-5-jglisse@redhat.com> (raw) In-Reply-To: <20180404191831.5378-1-jglisse@redhat.com> From: Jérôme Glisse <jglisse@redhat.com> For now this simply use exist page_mapping() inline. Latter it will use buffer head pointer as a key to lookup mapping for write protected page. Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Cc: linux-mm@kvack.org CC: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Cc: Tejun Heo <tj@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Josef Bacik <jbacik@fb.com> Cc: Mel Gorman <mgorman@techsingularity.net> --- include/linux/mm-page.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/mm-page.h b/include/linux/mm-page.h index 2981db45eeef..647a8a8cf9ba 100644 --- a/include/linux/mm-page.h +++ b/include/linux/mm-page.h @@ -132,5 +132,17 @@ static inline unsigned long _page_file_offset(struct page *page, return page->index << PAGE_SHIFT; } +/* + * fs_page_mapping_get_with_bh() - page mapping knowing buffer_head + * @page: page struct pointer for which we want the mapping + * @bh: buffer_head associated with the page for the mapping + * Returns: page mapping for the given buffer head + */ +static inline struct address_space *fs_page_mapping_get_with_bh( + struct page *page, struct buffer_head *bh) +{ + return page_mapping(page); +} + #endif /* MM_PAGE_H */ #endif /* DOT_NOT_INCLUDE___INSIDE_MM */ -- 2.14.3
WARNING: multiple messages have this Message-ID (diff)
From: jglisse@redhat.com To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org, "Jérôme Glisse" <jglisse@redhat.com>, "Andrew Morton" <akpm@linux-foundation.org>, "Alexander Viro" <viro@zeniv.linux.org.uk>, "Tejun Heo" <tj@kernel.org>, "Jan Kara" <jack@suse.cz>, "Josef Bacik" <jbacik@fb.com>, "Mel Gorman" <mgorman@techsingularity.net> Subject: [RFC PATCH 07/79] mm/page: add helpers to find mapping give a page and buffer head Date: Wed, 4 Apr 2018 15:17:54 -0400 [thread overview] Message-ID: <20180404191831.5378-5-jglisse@redhat.com> (raw) In-Reply-To: <20180404191831.5378-1-jglisse@redhat.com> From: JA(C)rA'me Glisse <jglisse@redhat.com> For now this simply use exist page_mapping() inline. Latter it will use buffer head pointer as a key to lookup mapping for write protected page. Signed-off-by: JA(C)rA'me Glisse <jglisse@redhat.com> Cc: linux-mm@kvack.org CC: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Cc: Tejun Heo <tj@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Josef Bacik <jbacik@fb.com> Cc: Mel Gorman <mgorman@techsingularity.net> --- include/linux/mm-page.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/mm-page.h b/include/linux/mm-page.h index 2981db45eeef..647a8a8cf9ba 100644 --- a/include/linux/mm-page.h +++ b/include/linux/mm-page.h @@ -132,5 +132,17 @@ static inline unsigned long _page_file_offset(struct page *page, return page->index << PAGE_SHIFT; } +/* + * fs_page_mapping_get_with_bh() - page mapping knowing buffer_head + * @page: page struct pointer for which we want the mapping + * @bh: buffer_head associated with the page for the mapping + * Returns: page mapping for the given buffer head + */ +static inline struct address_space *fs_page_mapping_get_with_bh( + struct page *page, struct buffer_head *bh) +{ + return page_mapping(page); +} + #endif /* MM_PAGE_H */ #endif /* DOT_NOT_INCLUDE___INSIDE_MM */ -- 2.14.3
next prev parent reply other threads:[~2018-04-04 19:17 UTC|newest] Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-04-04 19:17 [RFC PATCH 00/79] Generic page write protection and a solution to page waitqueue jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` [RFC PATCH 04/79] pipe: add inode field to struct pipe_inode_info jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` [RFC PATCH 05/79] mm/swap: add an helper to get address_space from swap_entry_t jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` [RFC PATCH 06/79] mm/page: add helpers to dereference struct page index field jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` jglisse [this message] 2018-04-04 19:17 ` [RFC PATCH 07/79] mm/page: add helpers to find mapping give a page and buffer head jglisse 2018-04-04 19:17 ` [RFC PATCH 08/79] mm/page: add helpers to find page mapping and private given a bio jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` [RFC PATCH 09/79] fs: add struct address_space to read_cache_page() callback argument jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` [RFC PATCH 20/79] fs: add struct address_space to write_cache_pages() " jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` [RFC PATCH 22/79] fs: add struct inode to block_read_full_page() arguments jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:17 ` [RFC PATCH 24/79] fs: add struct inode to nobh_writepage() arguments jglisse 2018-04-04 19:17 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 26/79] fs: add struct address_space to mpage_readpage() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 27/79] fs: add struct address_space to fscache_read*() callback arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 28/79] fs: introduce page_is_truncated() helper jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 29/79] fs/block: add struct address_space to bdev_write_page() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 30/79] fs/block: add struct address_space to __block_write_begin() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 31/79] fs/block: add struct address_space to __block_write_begin_int() args jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 32/79] fs/block: do not rely on page->mapping get it from the context jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 33/79] fs/journal: add struct super_block to jbd2_journal_forget() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 34/79] fs/journal: add struct inode to jbd2_journal_revoke() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 35/79] fs/buffer: add struct address_space and struct page to end_io callback jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 36/79] fs/buffer: add struct super_block to bforget() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 37/79] fs/buffer: add struct super_block to __bforget() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 38/79] fs/buffer: add first buffer flag for first buffer_head in a page jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 39/79] fs/buffer: add struct address_space to clean_page_buffers() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 50/79] fs: stop relying on mapping field of struct page, get it from context jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 51/79] " jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 52/79] fs/buffer: use _page_has_buffers() instead of page_has_buffers() jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 63/79] mm/page: convert page's index lookup to be against specific mapping jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 64/79] mm/buffer: use _page_has_buffers() instead of page_has_buffers() jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 65/79] mm/swap: add struct swap_info_struct swap_readpage() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 68/79] mm/vma_address: convert page's index lookup to be against specific mapping jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 69/79] fs/journal: add struct address_space to jbd2_journal_try_to_free_buffers() arguments jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 70/79] mm: add struct address_space to mark_buffer_dirty() jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 71/79] mm: add struct address_space to set_page_dirty() jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 72/79] mm: add struct address_space to set_page_dirty_lock() jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 73/79] mm: pass down struct address_space to set_page_dirty() jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 74/79] mm/page_ronly: add config option for generic read only page framework jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 75/79] mm/page_ronly: add page read only core structure and helpers jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 76/79] mm/ksm: have ksm select PAGE_RONLY config jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 77/79] mm/ksm: hide set_page_stable_node() and page_stable_node() jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 78/79] mm/ksm: rename PAGE_MAPPING_KSM to PAGE_MAPPING_RONLY jglisse 2018-04-04 19:18 ` jglisse 2018-04-04 19:18 ` [RFC PATCH 79/79] mm/ksm: set page->mapping to page_ronly struct instead of stable_node jglisse 2018-04-04 19:18 ` jglisse 2018-04-18 14:13 ` [RFC PATCH 00/79] Generic page write protection and a solution to page waitqueue Jan Kara 2018-04-18 14:13 ` Jan Kara 2018-04-18 14:13 ` Jan Kara 2018-04-18 15:54 ` Jerome Glisse 2018-04-18 15:54 ` Jerome Glisse 2018-04-18 15:54 ` Jerome Glisse 2018-04-18 16:20 ` Darrick J. Wong 2018-04-18 16:20 ` Darrick J. Wong 2018-04-18 16:20 ` Darrick J. Wong 2018-04-19 10:32 ` Jan Kara 2018-04-19 14:52 ` Jerome Glisse 2018-04-19 14:52 ` Jerome Glisse 2018-04-19 14:52 ` Jerome Glisse 2018-04-20 19:57 ` Tim Chen 2018-04-20 19:57 ` Tim Chen 2018-04-20 22:19 ` Jerome Glisse 2018-04-20 22:19 ` Jerome Glisse 2018-04-20 22:19 ` Jerome Glisse 2018-04-20 23:48 ` Tim Chen 2018-04-20 23:48 ` Tim Chen
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