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| author | Chen Haonan <chen.haonan2@zte.com.cn> | 2023-12-19 21:06:25 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-12-19 20:55:16 +0100 |
| commit | 489c693bd04a2308865dc50f37bd0b5f6ad52deb (patch) | |
| tree | 49db6814bc27b53bfceb5c50e183c498b51a85a2 /kernel/power | |
| parent | 71cd7e80cfde548959952eac7063aeaea1f2e1c6 (diff) | |
| download | linux-489c693bd04a2308865dc50f37bd0b5f6ad52deb.tar.gz linux-489c693bd04a2308865dc50f37bd0b5f6ad52deb.tar.bz2 linux-489c693bd04a2308865dc50f37bd0b5f6ad52deb.zip | |
PM: hibernate: Use kmap_local_page() in copy_data_page()
kmap_atomic() has been deprecated in favor of kmap_local_page().
kmap_atomic() disables page-faults and preemption (the latter
only for !PREEMPT_RT kernels).The code between the mapping and
un-mapping in this patch does not depend on the above-mentioned
side effects.So simply replaced kmap_atomic() with kmap_local_page().
Signed-off-by: Chen Haonan <chen.haonan2@zte.com.cn>
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/snapshot.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index e3e8f1c6e75f..5c96ff067c64 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -1487,11 +1487,11 @@ static bool copy_data_page(unsigned long dst_pfn, unsigned long src_pfn) s_page = pfn_to_page(src_pfn); d_page = pfn_to_page(dst_pfn); if (PageHighMem(s_page)) { - src = kmap_atomic(s_page); - dst = kmap_atomic(d_page); + src = kmap_local_page(s_page); + dst = kmap_local_page(d_page); zeros_only = do_copy_page(dst, src); - kunmap_atomic(dst); - kunmap_atomic(src); + kunmap_local(dst); + kunmap_local(src); } else { if (PageHighMem(d_page)) { /* @@ -1499,9 +1499,9 @@ static bool copy_data_page(unsigned long dst_pfn, unsigned long src_pfn) * data modified by kmap_atomic() */ zeros_only = safe_copy_page(buffer, s_page); - dst = kmap_atomic(d_page); + dst = kmap_local_page(d_page); copy_page(dst, buffer); - kunmap_atomic(dst); + kunmap_local(dst); } else { zeros_only = safe_copy_page(page_address(d_page), s_page); } |