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Tue, 14 Oct 2025 12:10:20 +0000 (GMT) From: Kundan Kumar To: jaegeuk@kernel.org, chao@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, miklos@szeredi.hu, agruenba@redhat.com, trondmy@kernel.org, anna@kernel.org, akpm@linux-foundation.org, willy@infradead.org, mcgrof@kernel.org, clm@meta.com, david@fromorbit.com, amir73il@gmail.com, axboe@kernel.dk, hch@lst.de, ritesh.list@gmail.com, djwong@kernel.org, dave@stgolabs.net, wangyufei@vivo.com Cc: linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, gfs2@lists.linux.dev, linux-nfs@vger.kernel.org, linux-mm@kvack.org, gost.dev@samsung.com, kundan.kumar@samsung.com, anuj20.g@samsung.com, vishak.g@samsung.com, joshi.k@samsung.com Subject: [PATCH v2 03/16] writeback: link bdi_writeback to its corresponding bdi_writeback_ctx Date: Tue, 14 Oct 2025 17:38:32 +0530 Message-Id: <20251014120845.2361-4-kundan.kumar@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20251014120845.2361-1-kundan.kumar@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CMS-MailID: 20251014121026epcas5p1aecefead887a6b4b6745cca0519d1092 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20251014121026epcas5p1aecefead887a6b4b6745cca0519d1092 References: <20251014120845.2361-1-kundan.kumar@samsung.com> X-Rspamd-Server: rspam01 X-Stat-Signature: ug456i6z7kxnm1f9fkb5b44u6gdzbprq X-Rspam-User: X-Rspamd-Queue-Id: 1BBBD100010 X-HE-Tag: 1760443830-438040 X-HE-Meta: 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 +BDZ830W 2btB7pAM5c53r7R5RF1Ry+217uRxK7cQEpGfiCejYu0eZc9pRTh3lfnEmr7GmBCfAW807MwIYZrWjkRhp7wqmch5VunnTXPcSsXuFctLla9mN7P1x8PufYPldQZPOGEUY7L2O+JyIpobuVirp5zBj1UDwcL1pSU8YQnUTKsf4VGfH4UZzaG8xmd2zYZMmO9DsopTmyaEcJ9a3NAJF281eGR/lYg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Introduce a bdi_writeback_ctx field in bdi_writeback. This helps in fetching the writeback context from the bdi_writeback. Signed-off-by: Kundan Kumar Signed-off-by: Anuj Gupta --- mm/backing-dev.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 47196d326e16..754f2f6c6d7c 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -513,15 +513,16 @@ static void wb_update_bandwidth_workfn(struct work_struct *work) */ #define INIT_BW (100 << (20 - PAGE_SHIFT)) -static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi, - gfp_t gfp) +static int wb_init(struct bdi_writeback *wb, + struct bdi_writeback_ctx *bdi_wb_ctx, + struct backing_dev_info *bdi, gfp_t gfp) { int err; memset(wb, 0, sizeof(*wb)); wb->bdi = bdi; - wb->bdi_wb_ctx = bdi->wb_ctx[0]; + wb->bdi_wb_ctx = bdi_wb_ctx; wb->last_old_flush = jiffies; INIT_LIST_HEAD(&wb->b_dirty); INIT_LIST_HEAD(&wb->b_io); @@ -698,7 +699,7 @@ static int cgwb_create(struct backing_dev_info *bdi, goto out_put; } - ret = wb_init(wb, bdi, gfp); + ret = wb_init(wb, bdi_wb_ctx, bdi, gfp); if (ret) goto err_free; @@ -843,7 +844,7 @@ static int cgwb_bdi_init(struct backing_dev_info *bdi) mutex_init(&bdi->cgwb_release_mutex); init_rwsem(&bdi_wb_ctx->wb_switch_rwsem); - ret = wb_init(&bdi_wb_ctx->wb, bdi, GFP_KERNEL); + ret = wb_init(&bdi_wb_ctx->wb, bdi_wb_ctx, bdi, GFP_KERNEL); if (!ret) { bdi_wb_ctx->wb.memcg_css = &root_mem_cgroup->css; bdi_wb_ctx->wb.blkcg_css = blkcg_root_css; @@ -1000,7 +1001,7 @@ static int cgwb_bdi_init(struct backing_dev_info *bdi) for_each_bdi_wb_ctx(bdi, bdi_wb_ctx) { int ret; - ret = wb_init(&bdi_wb_ctx->wb, bdi, GFP_KERNEL); + ret = wb_init(&bdi_wb_ctx->wb, bdi_wb_ctx, bdi, GFP_KERNEL); if (ret) return ret; } -- 2.25.1