The patch titled Subject: highmem: fix a memory copy problem in memcpy_from_folio has been added to the -mm mm-hotfixes-unstable branch. Its filename is highmem-fix-a-memory-copy-problem-in-memcpy_from_folio.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Su Hui suhui@nfschina.com Subject: highmem: fix a memory copy problem in memcpy_from_folio Date: Thu, 30 Nov 2023 11:40:18 +0800

Clang static checker complains that value stored to 'from' is never read. And memcpy_from_folio() only copy the last chunk memory from folio to destination. Use 'to += chunk' to replace 'from += chunk' to fix this typo problem.

Link: https://lkml.kernel.org/r/20231130034017.1210429-1-suhui@nfschina.com Fixes: b23d03ef7af5 ("highmem: add memcpy_to_folio() and memcpy_from_folio()") Signed-off-by: Su Hui suhui@nfschina.com Reviewed-by: Matthew Wilcox (Oracle) willy@infradead.org Cc: Ira Weiny ira.weiny@intel.com Cc: Jiaqi Yan jiaqiyan@google.com Cc: Nathan Chancellor nathan@kernel.org Cc: Nick Desaulniers ndesaulniers@google.com Cc: Peter Collingbourne pcc@google.com Cc: Tom Rix trix@redhat.com Cc: Tony Luck tony.luck@intel.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

include/linux/highmem.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/highmem.h~highmem-fix-a-memory-copy-problem-in-memcpy_from_folio +++ a/include/linux/highmem.h @@ -454,7 +454,7 @@ static inline void memcpy_from_folio(cha memcpy(to, from, chunk); kunmap_local(from);

- from += chunk; + to += chunk; offset += chunk; len -= chunk; } while (len > 0); _

Patches currently in -mm which might be from suhui@nfschina.com are

highmem-fix-a-memory-copy-problem-in-memcpy_from_folio.patch