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authorLinus Torvalds <torvalds@linux-foundation.org>2017-04-16 00:07:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-04-16 00:07:03 +0300
commitd5ff0814fda50f0306e102f39640cf5bb76af08e (patch)
treed6b145670fa7cb6bbd91432bbc7410734166adeb /drivers/acpi
parent403a39f8b0c7b819f8c7ea14bc81f598b1d352cf (diff)
parent11e63f6d920d6f2dfd3cd421e939a4aec9a58dcd (diff)
downloadlinux-d5ff0814fda50f0306e102f39640cf5bb76af08e.tar.xz
Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull nvdimm fixes from Dan Williams: "A small crop of lockdep, sleeping while atomic, and other fixes / band-aids in advance of the full-blown reworks targeting the next merge window. The largest change here is "libnvdimm: fix blk free space accounting" which deletes a pile of buggy code that better testing would have caught before merging. The next change that is borderline too big for a late rc is switching the device-dax locking from rcu to srcu, I couldn't think of a smaller way to make that fix. The __copy_user_nocache fix will have a full replacement in 4.12 to move those pmem special case considerations into the pmem driver. The "libnvdimm: band aid btt vs clear poison locking" commit admits that our error clearing support for btt went in broken, so we just disable it in 4.11 and -stable. A replacement / full fix is in the pipeline for 4.12 Some of these would have been caught earlier had DEBUG_ATOMIC_SLEEP been enabled on my development station. I wonder if we should have: config DEBUG_ATOMIC_SLEEP default PROVE_LOCKING ...since I mistakenly thought I got both with PROVE_LOCKING=y. These have received a build success notification from the 0day robot, and some have appeared in a -next release with no reported issues" * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: x86, pmem: fix broken __copy_user_nocache cache-bypass assumptions device-dax: switch to srcu, fix rcu_read_lock() vs pte allocation libnvdimm: band aid btt vs clear poison locking libnvdimm: fix reconfig_mutex, mmap_sem, and jbd2_handle lockdep splat libnvdimm: fix blk free space accounting acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison)
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/nfit/core.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 662036bdc65e..c8ea9d698cd0 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1617,7 +1617,11 @@ static int cmp_map(const void *m0, const void *m1)
const struct nfit_set_info_map *map0 = m0;
const struct nfit_set_info_map *map1 = m1;
- return map0->region_offset - map1->region_offset;
+ if (map0->region_offset < map1->region_offset)
+ return -1;
+ else if (map0->region_offset > map1->region_offset)
+ return 1;
+ return 0;
}
/* Retrieve the nth entry referencing this spa */