On 28.08.25 18:57, Lorenzo Stoakes wrote:
On Thu, Aug 28, 2025 at 12:01:24AM +0200, David Hildenbrand wrote:
Let's make it clearer that we are operating within a single folio by
providing both the folio and the page.
This implies that for flush_dcache_folio() we'll now avoid one more
page->folio lookup, and that we can safely drop the "nth_page" usage.
Cc: Thomas Bogendoerfer <tsbog...@alpha.franken.de>
Signed-off-by: David Hildenbrand <da...@redhat.com>
---
arch/mips/include/asm/cacheflush.h | 11 +++++++----
arch/mips/mm/cache.c | 8 ++++----
2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/arch/mips/include/asm/cacheflush.h
b/arch/mips/include/asm/cacheflush.h
index 5d283ef89d90d..8d79bfc687d21 100644
--- a/arch/mips/include/asm/cacheflush.h
+++ b/arch/mips/include/asm/cacheflush.h
@@ -50,13 +50,14 @@ extern void (*flush_cache_mm)(struct mm_struct *mm);
extern void (*flush_cache_range)(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long
page, unsigned long pfn);
-extern void __flush_dcache_pages(struct page *page, unsigned int nr);
+extern void __flush_dcache_folio_pages(struct folio *folio, struct page *page,
unsigned int nr);
NIT: Be good to drop the extern.
I think I'll leave the one in, though, someone should clean up all of
them in one go.
Just imagine how the other functions would think about the new guy
showing off here. :)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
static inline void flush_dcache_folio(struct folio *folio)
{
if (cpu_has_dc_aliases)
- __flush_dcache_pages(&folio->page, folio_nr_pages(folio));
+ __flush_dcache_folio_pages(folio, folio_page(folio, 0),
+ folio_nr_pages(folio));
else if (!cpu_has_ic_fills_f_dc)
folio_set_dcache_dirty(folio);
}
@@ -64,10 +65,12 @@ static inline void flush_dcache_folio(struct folio *folio)
static inline void flush_dcache_page(struct page *page)
{
+ struct folio *folio = page_folio(page);
+
if (cpu_has_dc_aliases)
- __flush_dcache_pages(page, 1);
+ __flush_dcache_folio_pages(folio, page, folio_nr_pages(folio));
Hmmm, shouldn't this be 1 not folio_nr_pages()? Seems that the original
implementation only flushed a single page even if contained within a larger
folio?
Yes, reworked it 3 times and messed it up during the last rework. Thanks!
--
Cheers
David / dhildenb
