The patch titled
/dev/mem: cleanup unxlate_dev_mem_ptr() calls
has been added to the -mm tree. Its filename is
dev-mem-cleanup-unxlate_dev_mem_ptr-calls.patch
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: /dev/mem: cleanup unxlate_dev_mem_ptr() calls
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
No behaviour change.
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/char/mem.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff -puN drivers/char/mem.c~dev-mem-cleanup-unxlate_dev_mem_ptr-calls drivers/char/mem.c
--- a/drivers/char/mem.c~dev-mem-cleanup-unxlate_dev_mem_ptr-calls
+++ a/drivers/char/mem.c
@@ -131,6 +131,7 @@ static ssize_t read_mem(struct file * fi
size_t count, loff_t *ppos)
{
unsigned long p = *ppos;
+ unsigned long ret;
ssize_t read, sz;
char *ptr;
@@ -169,12 +170,10 @@ static ssize_t read_mem(struct file * fi
if (!ptr)
return -EFAULT;
- if (copy_to_user(buf, ptr, sz)) {
- unxlate_dev_mem_ptr(p, ptr);
- return -EFAULT;
- }
-
+ ret = copy_to_user(buf, ptr, sz);
unxlate_dev_mem_ptr(p, ptr);
+ if (ret)
+ return -EFAULT;
buf += sz;
p += sz;
@@ -232,16 +231,14 @@ static ssize_t write_mem(struct file * f
}
copied = copy_from_user(ptr, buf, sz);
+ unxlate_dev_mem_ptr(p, ptr);
if (copied) {
written += sz - copied;
- unxlate_dev_mem_ptr(p, ptr);
if (written)
break;
return -EFAULT;
}
- unxlate_dev_mem_ptr(p, ptr);
-
buf += sz;
p += sz;
count -= sz;
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
linux-next.patch
mm-memory-failure-remove-config_unevictable_lru-config-option.patch
readahead-add-blk_run_backing_dev.patch
readahead-add-blk_run_backing_dev-fix.patch
readahead-add-blk_run_backing_dev-fix-fix-2.patch
mm-clean-up-page_remove_rmap.patch
mm-oom-analysis-add-per-zone-statistics-to-show_free_areas.patch
mm-oom-analysis-add-buffer-cache-information-to-show_free_areas.patch
mm-oom-analysis-add-shmem-vmstat.patch
mm-shrink_inactive_list-nr_scan-accounting-fix-fix.patch
mm-vmstat-add-isolate-pages.patch
mm-vmstat-add-isolate-pages-fix.patch
vmscan-throttle-direct-reclaim-when-too-many-pages-are-isolated-already.patch
mm-remove-__addsub_zone_page_state.patch
mm-count-only-reclaimable-lru-pages-v2.patch
vmscan-move-clearpageactive-from-move_active_pages-to-shrink_active_list.patch
vmscan-kill-unnecessary-page-flag-test.patch
vmscan-kill-unnecessary-prefetch.patch
ksm-add-mmu_notifier-set_pte_at_notify.patch
ksm-first-tidy-up-madvise_vma.patch
ksm-define-madv_mergeable-and-madv_unmergeable.patch
ksm-the-mm-interface-to-ksm.patch
ksm-no-debug-in-page_dup_rmap.patch
ksm-identify-pageksm-pages.patch
ksm-kernel-samepage-merging.patch
ksm-prevent-mremap-move-poisoning.patch
ksm-change-copyright-message.patch
ksm-change-ksm-nice-level-to-be-5.patch
mm-do-batched-scans-for-mem_cgroup.patch
mm-vsmcan-check-shrink_active_list-sc-isolate_pages-return-value.patch
dev-mem-remove-redundant-test-on-len.patch
dev-mem-introduce-size_inside_page.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls-fix.patch
documentation-vm-gitignore-add-page-types.patch
page-types-add-feature-for-walking-process-address-space.patch
page-types-add-feature-for-walking-process-address-space-checkpatch-fixes.patch
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