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mm/readahead: add folio allocation helper

Browse Source 
Just a wrapper around filemap_alloc_folio() for now, but add it in
preparation for modifying the folio based on the 'ractl' being passed in.

No functional changes in this patch.

Link: https://lkml.kernel.org/r/20241220154831.1086649-4-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Brian Foster <bfoster@redhat.com>
Cc: Chris Mason <clm@meta.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Jens Axboe 2024-12-20 08:47:41 -07:00 committed by Andrew Morton
parent f598cdaafc
commit 1963de79d3
1 changed files with 11 additions and 5 deletions
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16
mm/readahead.c
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@ -178,6 +178,12 @@ static void read_pages(struct readahead_control *rac)
BUG_ON(readahead_count(rac));
}
static struct folio *ractl_alloc_folio(struct readahead_control *ractl,
gfp_t gfp_mask, unsigned int order)
{
return filemap_alloc_folio(gfp_mask, order);
}
/**
* page_cache_ra_unbounded - Start unchecked readahead.
* @ractl: Readahead control.
@ -255,8 +261,8 @@ void page_cache_ra_unbounded(struct readahead_control *ractl,
continue;
}
folio = filemap_alloc_folio(gfp_mask,
mapping_min_folio_order(mapping));
folio = ractl_alloc_folio(ractl, gfp_mask,
mapping_min_folio_order(mapping));
if (!folio)
break;
@ -426,7 +432,7 @@ static inline int ra_alloc_folio(struct readahead_control *ractl, pgoff_t index,
pgoff_t mark, unsigned int order, gfp_t gfp)
{
int err;
struct folio *folio = filemap_alloc_folio(gfp, order);
struct folio *folio = ractl_alloc_folio(ractl, gfp, order);
if (!folio)
return -ENOMEM;
@ -751,7 +757,7 @@ void readahead_expand(struct readahead_control *ractl,
if (folio && !xa_is_value(folio))
return; /* Folio apparently present */
folio = filemap_alloc_folio(gfp_mask, min_order);
folio = ractl_alloc_folio(ractl, gfp_mask, min_order);
if (!folio)
return;
@ -780,7 +786,7 @@ void readahead_expand(struct readahead_control *ractl,
if (folio && !xa_is_value(folio))
return; /* Folio apparently present */
folio = filemap_alloc_folio(gfp_mask, min_order);
folio = ractl_alloc_folio(ractl, gfp_mask, min_order);
if (!folio)
return;