hugetlb_cgroup: remove unused hugetlb_cgroup_from_counter macro

Patch series "Some cleanups and improvements for hugetlb".

This patchset does some cleanups and improvements for hugetlb and
hugetlb_cgroup.

This patch (of 4):

Since commit 726b7bbe ("hugetlb_cgroup: fix illegal access to
memory"), the hugetlb_cgroup_from_counter() macro is not used any more,
remove it.

Link: https://lkml.kernel.org/r/cover.1634797639.git.baolin.wang@linux.alibaba.com
Link: https://lkml.kernel.org/r/f03b29b801fa9942466ab15334ec09988e124ae6.1634797639.git.baolin.wang@linux.alibaba.comSigned-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/hugetlb_cgroup.c

@@ -27,9 +27,6 @@
 #define MEMFILE_IDX(val)	(((val) >> 16) & 0xffff)
 #define MEMFILE_ATTR(val)	((val) & 0xffff)
 
-#define hugetlb_cgroup_from_counter(counter, idx)                   \
-	container_of(counter, struct hugetlb_cgroup, hugepage[idx])
-
 static struct hugetlb_cgroup *root_h_cgroup __read_mostly;
 
 static inline struct page_counter *