leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

lib/test_hmm: remove set but unused page variable

Browse Source 
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page has been revoked.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has been revoked.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: b659baea75 ("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>
This commit is contained in:
Alistair Popple 2021-07-14 21:26:58 -07:00 committed by Linus Torvalds
parent ab7965de17
commit c52114d9df
1 changed files with 0 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/test_hmm.c
View File

@ -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;
}