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| author | Mark Brown <broonie@kernel.org> | 2021-05-18 17:24:52 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-05-18 17:24:52 +0100 |
| commit | c37fe6aff89cb0d842993fe2f69e48bf3ebe0ab0 (patch) | |
| tree | 2a322c48218f7006bab789b7bf16ec58b129a096 /arch/powerpc/include/asm/cacheflush.h | |
| parent | d7aed20d446d8c87f5e13adf73281056b0064a45 (diff) | |
| parent | d07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff) | |
Merge tag 'v5.13-rc2' into spi-5.13
Linux 5.13-rc2
Diffstat (limited to 'arch/powerpc/include/asm/cacheflush.h')
| -rw-r--r-- | arch/powerpc/include/asm/cacheflush.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/cacheflush.h b/arch/powerpc/include/asm/cacheflush.h index f63495109f63..7564dd4fd12b 100644 --- a/arch/powerpc/include/asm/cacheflush.h +++ b/arch/powerpc/include/asm/cacheflush.h @@ -30,7 +30,19 @@ static inline void flush_cache_vmap(unsigned long start, unsigned long end) #endif /* CONFIG_PPC_BOOK3S_64 */ #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 -extern void flush_dcache_page(struct page *page); +/* + * This is called when a page has been modified by the kernel. + * It just marks the page as not i-cache clean. We do the i-cache + * flush later when the page is given to a user process, if necessary. + */ +static inline void flush_dcache_page(struct page *page) +{ + if (cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) + return; + /* avoid an atomic op if possible */ + if (test_bit(PG_dcache_clean, &page->flags)) + clear_bit(PG_dcache_clean, &page->flags); +} void flush_icache_range(unsigned long start, unsigned long stop); #define flush_icache_range flush_icache_range @@ -40,7 +52,6 @@ void flush_icache_user_page(struct vm_area_struct *vma, struct page *page, #define flush_icache_user_page flush_icache_user_page void flush_dcache_icache_page(struct page *page); -void __flush_dcache_icache(void *page); /** * flush_dcache_range(): Write any modified data cache blocks out to memory and |