Commit fcb012bc authored by Huacai Chen's avatar Huacai Chen Committed by Hongchen Zhang
Browse files

LoongArch: Remove superfluous flush_dcache_page() definition 

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/?id=82bf60a6fed806d57e284a1fb40dbc1ad5097611



--------------------------------

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: default avatarkernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403091614.NeUw5zcv-lkp@intel.com/


Suggested-by: default avatarBarry Song <baohua@kernel.org>
Acked-by: default avatarBarry Song <baohua@kernel.org>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent df4c334b

arch/loongarch/include/asm/cacheflush.h

+0 −3
Original line number Diff line number Diff line
@@ -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)