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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-12-16 11:06:33 -0500 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-10-18 07:49:36 -0400 |
| commit | 08b0b0059bf1c2e8637f724cc7cc4d29b1e808de (patch) | |
| tree | 795315583bdbd72e41a2509662d48f377d477893 /Documentation/core-api | |
| parent | 646010009d3541b8cb4f803dcb4b8d0da2f22579 (diff) | |
| download | lwn-08b0b0059bf1c2e8637f724cc7cc4d29b1e808de.tar.gz lwn-08b0b0059bf1c2e8637f724cc7cc4d29b1e808de.zip | |
mm: Add flush_dcache_folio()
This is a default implementation which calls flush_dcache_page() on
each page in the folio. If architectures can do better, they should
implement their own version of it.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Diffstat (limited to 'Documentation/core-api')
| -rw-r--r-- | Documentation/core-api/cachetlb.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/core-api/cachetlb.rst b/Documentation/core-api/cachetlb.rst index 8aed9103e48a..5c0552e78c58 100644 --- a/Documentation/core-api/cachetlb.rst +++ b/Documentation/core-api/cachetlb.rst @@ -326,6 +326,12 @@ maps this page at its virtual address. dirty. Again, see sparc64 for examples of how to deal with this. + ``void flush_dcache_folio(struct folio *folio)`` + This function is called under the same circumstances as + flush_dcache_page(). It allows the architecture to + optimise for flushing the entire folio of pages instead + of flushing one page at a time. + ``void copy_to_user_page(struct vm_area_struct *vma, struct page *page, unsigned long user_vaddr, void *dst, void *src, int len)`` ``void copy_from_user_page(struct vm_area_struct *vma, struct page *page, |