+ mm-hugetlb-remove-vm_bug_onnrg-in-get_file_region_entry_from_cache.patch added to -mm tree

+ mm-hugetlb-remove-vm_bug_onnrg-in-get_file_region_entry_from_cache.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/hugetlb: remove VM_BUG_ON(!nrg) in get_file_region_entry_from_cache()
has been added to the -mm tree.  Its filename is
     mm-hugetlb-remove-vm_bug_onnrg-in-get_file_region_entry_from_cache.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-remove-vm_bug_onnrg-in-get_file_region_entry_from_cache.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-remove-vm_bug_onnrg-in-get_file_region_entry_from_cache.patch

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------------------------------------------------------
From: Wei Yang <richard.weiyang@linux.alibaba.com>
Subject: mm/hugetlb: remove VM_BUG_ON(!nrg) in get_file_region_entry_from_cache()

We are sure to get a valid file_region, otherwise the
VM_BUG_ON(resv->region_cache_count <= 0) at the very beginning would be
triggered.

Let's remove the redundant one.

Link: https://lkml.kernel.org/r/20200831022351.20916-3-richard.weiyang@linux.alibaba.com
Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    1 -
 1 file changed, 1 deletion(-)

--- a/mm/hugetlb.c~mm-hugetlb-remove-vm_bug_onnrg-in-get_file_region_entry_from_cache
+++ a/mm/hugetlb.c
@@ -240,7 +240,6 @@ get_file_region_entry_from_cache(struct
 
 	resv->region_cache_count--;
 	nrg = list_first_entry(&resv->region_cache, struct file_region, link);
-	VM_BUG_ON(!nrg);
 	list_del(&nrg->link);
 
 	nrg->from = from;
_

Patches currently in -mm which might be from richard.weiyang@linux.alibaba.com are

mm-mmap-rename-__vma_unlink_common-to-__vma_unlink.patch
mm-mmap-leverage-vma_rb_erase_ignore-to-implement-vma_rb_erase.patch
mm-mmap-leave-adjust_next-as-virtual-address-instead-of-page-frame-number.patch
mm-hugetlb-not-necessary-to-coalesce-regions-recursively.patch
mm-hugetlb-remove-vm_bug_onnrg-in-get_file_region_entry_from_cache.patch
mm-hugetlb-use-list_splice-to-merge-two-list-at-once.patch
mm-hugetlb-count-file_region-to-be-added-when-regions_needed-=-null.patch
mm-hugetlb-a-page-from-buddy-is-not-on-any-list.patch
mm-hugetlb-narrow-the-hugetlb_lock-protection-area-during-preparing-huge-page.patch
mm-hugetlb-take-the-free-hpage-during-the-iteration-directly.patch
mm-page_reporting-drop-stale-list-head-check-in-page_reporting_cycle.patch
bitops-simplify-get_count_order_long.patch
bitops-use-the-same-mechanism-for-get_count_order.patch