mm/readahead: simplify page_cache_ra_unbounded loop counter reset#1306
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vfsci-bot[bot] wants to merge 1 commit intovfs.base.cifrom
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mm/readahead: simplify page_cache_ra_unbounded loop counter reset#1306vfsci-bot[bot] wants to merge 1 commit intovfs.base.cifrom
vfsci-bot[bot] wants to merge 1 commit intovfs.base.cifrom
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Minor cleanup, no behavior change intended. `read_pages` ensures that `ractl->_nr_pages` is zero before it returns, so the `ractl->_nr_pages` term in these expressions contributes nothing. This seems to have been true since the statements were introduced in commit f615bd5 ("mm/readahead: Handle ractl nr_pages being modified"). The new expression has an intuitive explanation. When filesystems perform readahead, they increment `ractl->_index` by the number of pages processed, so, after `read_pages` returns, `ractl->_index` points to the first page after those already processed. `index` points to the first page considered in the loop. So, `ractl->_index - index` is the number of pages processed by the loop so far. Signed-off-by: Frederick Mayle <fmayle@google.com>
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Series: https://patchwork.kernel.org/project/linux-fsdevel/list/?series=1088394
Submitter: Frederick Mayle
Version: 1
Patches: 1/1
Message-ID:
<20260501011908.3630802-1-fmayle@google.com>Base: vfs.base.ci
Lore: https://lore.kernel.org/linux-fsdevel/20260501011908.3630802-1-fmayle@google.com
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