diff options
| author | Baoquan He <bhe@redhat.com> | 2016-09-15 16:50:50 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2016-09-19 15:49:01 +0200 |
| commit | 134414fffc7fdad81e228d232f8ae12a0456127a (patch) | |
| tree | 62e06f833b35b06c524cfeac4f3ca5d2924ae78a /drivers/iommu | |
| parent | 368d06cd536ecace3a904ae2e6e42771636d52aa (diff) | |
iommu/amd: Clean up the cmpxchg64 invocation
Change it as it's designed for and keep it consistent with other
places.
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index bebe728019af..897940c79a54 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1342,7 +1342,8 @@ static u64 *alloc_pte(struct protection_domain *domain, __npte = PM_LEVEL_PDE(level, virt_to_phys(page)); - if (cmpxchg64(pte, __pte, __npte)) { + /* pte could have been changed somewhere. */ + if (cmpxchg64(pte, __pte, __npte) != __pte) { free_page((unsigned long)page); continue; } |