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| author | Alistair Popple <apopple@nvidia.com> | 2021-07-14 21:26:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-07-15 10:13:49 -0700 |
| commit | c52114d9df6a193fba5317933c75bc9bb5f6cf8a (patch) | |
| tree | d33d5d70f1db0cb7880912ab67c5303aca928fb9 /lib/test_hmm.c | |
| parent | ab7965de1725cd8514f0edbced5c2fb793846078 (diff) | |
| download | linux-stable-c52114d9df6a193fba5317933c75bc9bb5f6cf8a.tar.gz linux-stable-c52114d9df6a193fba5317933c75bc9bb5f6cf8a.tar.bz2 linux-stable-c52114d9df6a193fba5317933c75bc9bb5f6cf8a.zip | |
lib/test_hmm: remove set but unused page variable
The HMM selftests use atomic_check_access() to check atomic access to a
page has been revoked. It doesn't matter if the page mapping has been
removed from the mirrored page tables as that also implies atomic access
has been revoked. Therefore remove the unused page variable to fix this
compiler warning:
lib/test_hmm.c:631:16: warning: variable `page' set but not used [-Wunused-but-set-variable]
Link: https://lkml.kernel.org/r/20210706025603.4059-1-apopple@nvidia.com
Fixes: b659baea7546 ("mm: selftests for exclusive device memory")
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_hmm.c')
| -rw-r--r-- | lib/test_hmm.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/lib/test_hmm.c b/lib/test_hmm.c index 8c55c4723692..c259842f6d44 100644 --- a/lib/test_hmm.c +++ b/lib/test_hmm.c @@ -628,10 +628,8 @@ static int dmirror_check_atomic(struct dmirror *dmirror, unsigned long start, for (pfn = start >> PAGE_SHIFT; pfn < (end >> PAGE_SHIFT); pfn++) { void *entry; - struct page *page; entry = xa_load(&dmirror->pt, pfn); - page = xa_untag_pointer(entry); if (xa_pointer_tag(entry) == DPT_XA_TAG_ATOMIC) return -EPERM; } |