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mips: mm: convert __flush_dcache_pages() to __flush_dcache_folio_pages() 

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.

While at it, drop the "extern" from the function declaration.

Link: https://lkml.kernel.org/r/20250901150359.867252-22-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
pull/1354/merge
David Hildenbrand 2025-09-01 17:03:42 +02:00 committed by Andrew Morton
parent d99c57546d
commit b71ddc9ecc
2 changed files with 11 additions and 8 deletions
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11
arch/mips/include/asm/cacheflush.h
View File

@ -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);
void __flush_dcache_folio_pages(struct folio *folio, struct page *page, unsigned int nr);
#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, 1);
else if (!cpu_has_ic_fills_f_dc)
folio_set_dcache_dirty(page_folio(page));
folio_set_dcache_dirty(folio);
}
#define flush_dcache_mmap_lock(mapping) do { } while (0)

8
arch/mips/mm/cache.c
View File

@ -99,9 +99,9 @@ SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes,
return 0;
}
void __flush_dcache_pages(struct page *page, unsigned int nr)
void __flush_dcache_folio_pages(struct folio *folio, struct page *page,
unsigned int nr)
{
struct folio *folio = page_folio(page);
struct address_space *mapping = folio_flush_mapping(folio);
unsigned long addr;
unsigned int i;
@ -117,12 +117,12 @@ void __flush_dcache_pages(struct page *page, unsigned int nr)
* get faulted into the tlb (and thus flushed) anyways.
*/
for (i = 0; i < nr; i++) {
addr = (unsigned long)kmap_local_page(nth_page(page, i));
addr = (unsigned long)kmap_local_page(page + i);
flush_data_cache_page(addr);
kunmap_local((void *)addr);
}
}
EXPORT_SYMBOL(__flush_dcache_pages);
EXPORT_SYMBOL(__flush_dcache_folio_pages);
void __flush_anon_page(struct page *page, unsigned long vmaddr)
{