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Fri, 14 Apr 2023 11:08:25 +0000 (GMT) From: Pankaj Raghav To: brauner@kernel.org, willy@infradead.org, viro@zeniv.linux.org.uk, akpm@linux-foundation.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mcgrof@kernel.org, gost.dev@samsung.com, hare@suse.de, Pankaj Raghav Subject: [RFC 1/4] fs/buffer: add set_bh_folio helper Date: Fri, 14 Apr 2023 13:08:18 +0200 Message-Id: <20230414110821.21548-2-p.raghav@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230414110821.21548-1-p.raghav@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrKKsWRmVeSWpSXmKPExsWy7djP87paJpYpBg8fc1jMWb+GzeL14U+M FjcP7GSy2LNoEpDYe5LF4vKuOWwWNyY8ZbT4vLSF3eL83+OsFr9/zGFz4PLYvELLY9OqTjaP EzN+s3j0bVnF6LH5dLXH501yHpuevGUKYI/isklJzcksSy3St0vgyljx6TRLwR+eik8XHrI0 MN7i6mLk5JAQMJF4NuUNexcjF4eQwApGidvTbzCBJIQEvjBKrLlvApH4zChxacdDZpiOI5v+ M0EkljNKXP/RzwzR8ZJRYtoN7y5GDg42AS2Jxk52EFNEIFHi5nsFkHJmgQWMErduv2cHKRcW MJXYs/gLWCuLgKrEgq5GNhCbV8BSYtmNdjaIXfIS+w+eBavhFLCSeLPsAlSNoMTJmU9YQGxm oJrmrbOZQRZICNzhkGi7dYgVotlFYsW0qVC2sMSr41vYIWwZif875zNB2NUST2/8hmpuYZTo 37meDeRqCQFrib4zOSAms4CmxPpd+hDljhIv+/qZICr4JG68FYQ4gU9i0rbpzBBhXomONiGI aiWJnT+fQC2VkLjcNIcFwvaQWDfjA9sERsVZSJ6ZheSZWQh7FzAyr2IUTy0tzk1PLTbKSy3X K07MLS7NS9dLzs/dxAhMSaf/Hf+yg3H5q496hxiZOBgPMUpwMCuJ8P5wMU0R4k1JrKxKLcqP LyrNSS0+xCjNwaIkzqttezJZSCA9sSQ1OzW1ILUIJsvEwSnVwCTy5lehfec1wR8vljTelPTf 3XP+sIHSs5O5OVqlLxus3pl6tHz/uVHE8cWB8KTkDK4Fh164K7+UWP/pzoffkhMYLhozsYvJ mfIsX/otoMSYX1BcMZx9vr7y9VXsQRuFKv9mS2jPTJQNDZndVy318aG0sanEC4ewBYWlzIac V4O6tafd0HUOLWs7+nWVpIftnQNp/5fcsOSba/T77Y+sb8y3/p62X/VIdgoHG5fxleb7L8V0 arneW3RrqjoZzLytM9mudJp/yar40kWzxScwcd29J/W5pePPiwl8vSbbgjlnCjiHnrpguuZ/ rfHaFmWNuQW/2uW7m/fNeh66vPP+gdzNT7bxq8ds9avu1haaqMRSnJFoqMVcVJwIAOniHS64 AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprOIsWRmVeSWpSXmKPExsVy+t/xe7qaJpYpBgf/G1vMWb+GzeL14U+M FjcP7GSy2LNoEpDYe5LF4vKuOWwWNyY8ZbT4vLSF3eL83+OsFr9/zGFz4PLYvELLY9OqTjaP EzN+s3j0bVnF6LH5dLXH501yHpuevGUKYI/SsynKLy1JVcjILy6xVYo2tDDSM7S00DMysdQz NDaPtTIyVdK3s0lJzcksSy3St0vQy1jx6TRLwR+eik8XHrI0MN7i6mLk5JAQMJE4suk/Uxcj F4eQwFJGibm3VrNDJCQkbi9sYoSwhSX+XOtigyh6zijxecEXoA4ODjYBLYnGTrB6EYFUidMn PoLVMAssY5RYM/cFG0hCWMBUYs/iL8wgNouAqsSCrkawOK+ApcSyG+1sEAvkJfYfPAtWwylg JfFm2QWwuBBQTfuWJSwQ9YISJ2c+AbOZgeqbt85mnsAoMAtJahaS1AJGplWMIqmlxbnpucVG esWJucWleel6yfm5mxiBMbTt2M8tOxhXvvqod4iRiYPxEKMEB7OSCO8PF9MUId6UxMqq1KL8 +KLSnNTiQ4ymQHdPZJYSTc4HRnFeSbyhmYGpoYmZpYGppZmxkjivZ0FHopBAemJJanZqakFq EUwfEwenVANT8H7fy5KqD8W3vOvdZ6dXdVL9eGlSROP36f///Lx2c5N+7Mry+376HKETptUu uf7tStGbcwnX1C/3RDTPOHNSYvO+U1XHdzzhmLH61x/1istvJ2wwPZbffHi6j3NynMKNlIYg X/434lPuXbyo6P7+/tNr95KuK79+c/FP4N64Qts1d+YcrdWpqQoUSXpR9/um4b0fM2O2fFl9 frc523o2F5EjDQl172t0Sm94+l9Puf/pE7NigqZlYftHXe15npvi8iz2Mcje06lYkXKQZd0J nRSX/ft7ryj+cZrwpOdUb6b6svSCW74n5YInHF1xutJpTdvi93qdfzYGRsosKuc7WPPRb++t Y3tmv+raaHJ+WpkSS3FGoqEWc1FxIgC7JStKKgMAAA== X-CMS-MailID: 20230414110825eucas1p2faad8162ee3aac7ed17f735dcbfc2334 X-Msg-Generator: CA X-RootMTR: 20230414110825eucas1p2faad8162ee3aac7ed17f735dcbfc2334 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20230414110825eucas1p2faad8162ee3aac7ed17f735dcbfc2334 References: <20230414110821.21548-1-p.raghav@samsung.com> X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763150451036107879?= X-GMAIL-MSGID: =?utf-8?q?1763150451036107879?= The folio version of set_bh_page(). This is required to convert create_page_buffers() to create_folio_buffers() later in the series. Signed-off-by: Pankaj Raghav --- fs/buffer.c | 15 +++++++++++++++ include/linux/buffer_head.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/fs/buffer.c b/fs/buffer.c index b3eb905f87d6..44380ff3a31f 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1484,6 +1484,21 @@ void set_bh_page(struct buffer_head *bh, } EXPORT_SYMBOL(set_bh_page); +void set_bh_folio(struct buffer_head *bh, struct folio *folio, + unsigned long offset) +{ + bh->b_folio = folio; + BUG_ON(offset >= folio_size(folio)); + if (folio_test_highmem(folio)) + /* + * This catches illegal uses and preserves the offset: + */ + bh->b_data = (char *)(0 + offset); + else + bh->b_data = folio_address(folio) + offset; +} +EXPORT_SYMBOL(set_bh_folio); + /* * Called when truncating a buffer on a page completely. */ diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 8f14dca5fed7..d5a2ef9b4cdf 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -196,6 +196,8 @@ void mark_buffer_write_io_error(struct buffer_head *bh); void touch_buffer(struct buffer_head *bh); void set_bh_page(struct buffer_head *bh, struct page *page, unsigned long offset); +void set_bh_folio(struct buffer_head *bh, struct folio *folio, + unsigned long offset); bool try_to_free_buffers(struct folio *); struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size, bool retry);