From: Huacai Chen chenhuacai@loongson.cn
mainline inclusion from mainline-v6.9-rc1 commit 82bf60a6fed806d57e284a1fb40dbc1ad5097611 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IB7Y4K CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
--------------------------------
LoongArch doesn't have cache aliases, so flush_dcache_page() is a no-op. There is a generic implementation for this case in include/asm-generic/ cacheflush.h. So remove the superfluous flush_dcache_page() definition, which also silences such build warnings:
In file included from crypto/scompress.c:12: include/crypto/scatterwalk.h: In function 'scatterwalk_pagedone': include/crypto/scatterwalk.h:76:30: warning: variable 'page' set but not used [-Wunused-but-set-variable] 76 | struct page *page; | ^~~~ crypto/scompress.c: In function 'scomp_acomp_comp_decomp':
crypto/scompress.c:174:38: warning: unused variable 'dst_page' [-Wunused-variable]
174 | struct page *dst_page = sg_page(req->dst); |
Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202403091614.NeUw5zcv-lkp@intel.com/ Suggested-by: Barry Song baohua@kernel.org Acked-by: Barry Song baohua@kernel.org Signed-off-by: Huacai Chen chenhuacai@loongson.cn --- arch/loongarch/include/asm/cacheflush.h | 3 --- 1 file changed, 3 deletions(-)
diff --git a/arch/loongarch/include/asm/cacheflush.h b/arch/loongarch/include/asm/cacheflush.h index 80bd74106985..f8754d08a31a 100644 --- a/arch/loongarch/include/asm/cacheflush.h +++ b/arch/loongarch/include/asm/cacheflush.h @@ -37,8 +37,6 @@ void local_flush_icache_range(unsigned long start, unsigned long end); #define flush_icache_range local_flush_icache_range #define flush_icache_user_range local_flush_icache_range
-#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 - #define flush_cache_all() do { } while (0) #define flush_cache_mm(mm) do { } while (0) #define flush_cache_dup_mm(mm) do { } while (0) @@ -47,7 +45,6 @@ void local_flush_icache_range(unsigned long start, unsigned long end); #define flush_cache_vmap(start, end) do { } while (0) #define flush_cache_vunmap(start, end) do { } while (0) #define flush_icache_user_page(vma, page, addr, len) do { } while (0) -#define flush_dcache_page(page) do { } while (0) #define flush_dcache_mmap_lock(mapping) do { } while (0) #define flush_dcache_mmap_unlock(mapping) do { } while (0)