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Date: Wed, 16 Dec 2020 22:01:00 +0000 From: Matthew Wilcox <willy@...radead.org> To: kernel test robot <lkp@...el.com> Cc: linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 23/25] mm: Add flush_dcache_folio On Thu, Dec 17, 2020 at 04:59:21AM +0800, kernel test robot wrote: > All errors (new ones prefixed by >>): > > In file included from arch/powerpc/include/asm/cacheflush.h:111, > from include/linux/highmem.h:12, > from include/linux/pagemap.h:11, > from include/linux/blkdev.h:14, > from include/linux/blk-cgroup.h:23, > from include/linux/writeback.h:14, > from include/linux/memcontrol.h:22, > from include/linux/swap.h:9, > from include/linux/suspend.h:5, > from arch/powerpc/kernel/asm-offsets.c:23: > include/asm-generic/cacheflush.h: In function 'flush_dcache_folio': > >> include/asm-generic/cacheflush.h:64:33: error: subscripted value is neither array nor pointer nor vector > 64 | flush_dcache_page(&folio->page[--n]); Thanks. Apparently I need to compile on more than just x86 ;-) This compiles on aargh64: @@ -61,7 +61,8 @@ static inline void flush_dcache_folio(struct folio *folio) unsigned int n = folio_nr_pages(folio); do { - flush_dcache_page(&folio->page[--n]); + n--; + flush_dcache_page(&folio->page + n); } while (n); } #endif I'll fold it into my git tree.
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