The patch titled
Subject: mm-optimize-copy_page_to-from_iter_iovec-fix-fix
has been added to the -mm tree. Its filename is
mm-optimize-copy_page_to-from_iter_iovec-fix-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-optimize-copy_page_to-from_iter_iovec-fix-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-optimize-copy_page_to-from_iter_iovec-fix-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-optimize-copy_page_to-from_iter_iovec-fix-fix
change copy_page_from_iter_iovec() as well
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/iov_iter.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff -puN lib/iov_iter.c~mm-optimize-copy_page_to-from_iter_iovec-fix-fix lib/iov_iter.c
--- a/lib/iov_iter.c~mm-optimize-copy_page_to-from_iter_iovec-fix-fix
+++ a/lib/iov_iter.c
@@ -242,8 +242,7 @@ static size_t copy_page_from_iter_iovec(
buf = iov->iov_base + skip;
copy = min(bytes, iov->iov_len - skip);
-#ifdef CONFIG_HIGHMEM
- if (!fault_in_pages_readable(buf, copy)) {
+ if (IS_ENABLED(CONFIG_HIGHMEM) && !fault_in_pages_readable(buf, copy)) {
kaddr = kmap_atomic(page);
to = kaddr + offset;
@@ -274,7 +273,6 @@ static size_t copy_page_from_iter_iovec(
copy = min(bytes, iov->iov_len - skip);
}
/* Too bad - revert to non-atomic kmap */
-#endif
kaddr = kmap(page);
to = kaddr + offset;
@@ -295,9 +293,7 @@ static size_t copy_page_from_iter_iovec(
}
kunmap(page);
-#ifdef CONFIG_HIGHMEM
done:
-#endif
if (skip == iov->iov_len) {
iov++;
skip = 0;
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
arm-arch-arm-include-asm-pageh-needs-personalityh.patch
ocfs2-improve-recovery-performance-v2-fix.patch
ocfs2-dlm-disable-bug_on-when-dlm_lock_res_dropping_ref-is-cleared-before-dlm_deref_lockres_done_handler-fix.patch
mm.patch
mm-reorganize-slab-freelist-randomization-fix.patch
mm-balloon-use-general-non-lru-movable-page-feature-fix.patch
mm-compaction-split-freepages-without-holding-the-zone-lock-fix-2.patch
mm-frontswap-convert-frontswap_enabled-to-static-key-checkpatch-fixes.patch
mm-add-nr_zsmalloc-to-vmstat-fix.patch
mm-memcg-use-consistent-gfp-flags-during-readahead-checkpatch-fixes.patch
mm-thp-make-swapin-readahead-under-down_read-of-mmap_sem-fix-2-fix.patch
mm-fix-build-warnings-in-linux-compactionh-fix.patch
mm-update-the-comment-in-__isolate_free_page-checkpatch-fixes.patch
revert-mm-mempool-only-set-__gfp_nomemalloc-if-there-are-free-elements-checkpatch-fixes.patch
mm-optimize-copy_page_to-from_iter_iovec-fix.patch
mm-optimize-copy_page_to-from_iter_iovec-fix-fix.patch
treewide-replace-obsolete-_refok-by-__ref-checkpatch-fixes.patch
printk-create-pr_level-functions-fix.patch
kexec-ensure-user-memory-sizes-do-not-wrap-fix.patch
kexec-allow-architectures-to-override-boot-mapping-fix.patch
allow-kdump-with-crash_kexec_post_notifiers-fix.patch
kexec-add-resriction-on-the-kexec_load-fix.patch
linux-next-rejects.patch
drivers-net-wireless-intel-iwlwifi-dvm-calibc-fix-min-warning.patch
bitmap-bitmap_equal-memcmp-optimization-fix.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
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