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block: ensure bdi->io_pages is always initialized
[ Upstream commitde1b0ee490
] If a driver leaves the limit settings as the defaults, then we don't initialize bdi->io_pages. This means that file systems may need to work around bdi->io_pages == 0, which is somewhat messy. Initialize the default value just like we do for ->ra_pages. Cc: stable@vger.kernel.org Fixes:9491ae4aad
("mm: don't cap request size based on read-ahead setting") Reported-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -852,6 +852,8 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
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q->backing_dev_info->ra_pages =
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(VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
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q->backing_dev_info->io_pages =
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(VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
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q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
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q->backing_dev_info->name = "block";
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q->node = node_id;
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