+ mm-hugeltb-remove-redundant-vm_bug_on-in-region_add.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: mm/hugeltb: remove redundant VM_BUG_ON() in region_add()
has been added to the -mm tree.  Its filename is
     mm-hugeltb-remove-redundant-vm_bug_on-in-region_add.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-hugeltb-remove-redundant-vm_bug_on-in-region_add.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-hugeltb-remove-redundant-vm_bug_on-in-region_add.patch

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------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/hugeltb: remove redundant VM_BUG_ON() in region_add()

Patch series "Cleanup and fixup for hugetlb", v2.

This series contains cleanups to remove redundant VM_BUG_ON() and simplify
the return code.  Also this handles the error case in
hugetlb_fix_reserve_counts() correctly.  More details can be found in the
respective changelogs.


This patch (of 5):

The same VM_BUG_ON() check is already done in the callee.  Remove this
extra one to simplify the code slightly.

Link: https://lkml.kernel.org/r/20210410072348.20437-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20210410072348.20437-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Feilong Lin <linfeilong@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

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

--- a/mm/hugetlb.c~mm-hugeltb-remove-redundant-vm_bug_on-in-region_add
+++ a/mm/hugetlb.c
@@ -553,7 +553,6 @@ retry:
 	resv->adds_in_progress -= in_regions_needed;
 
 	spin_unlock(&resv->lock);
-	VM_BUG_ON(add < 0);
 	return add;
 }
 
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-hugetlb-remove-redundant-reservation-check-condition-in-alloc_huge_page.patch
mm-hugetlb-use-some-helper-functions-to-cleanup-code.patch
mm-hugetlb-optimize-the-surplus-state-transfer-code-in-move_hugetlb_state.patch
hugetlb_cgroup-remove-unnecessary-vm_bug_on_page-in-hugetlb_cgroup_migrate.patch
mm-hugetlb-simplify-the-code-when-alloc_huge_page-failed-in-hugetlb_no_page.patch
mm-hugetlb-avoid-calculating-fault_mutex_hash-in-truncate_op-case.patch
khugepaged-remove-unneeded-return-value-of-khugepaged_collapse_pte_mapped_thps.patch
khugepaged-reuse-the-smp_wmb-inside-__setpageuptodate.patch
khugepaged-use-helper-khugepaged_test_exit-in-__khugepaged_enter.patch
khugepaged-fix-wrong-result-value-for-trace_mm_collapse_huge_page_isolate.patch
mm-huge_memoryc-remove-unnecessary-local-variable-ret2.patch
mm-huge_memoryc-rework-the-function-vma_adjust_trans_huge.patch
mm-huge_memoryc-make-get_huge_zero_page-return-bool.patch
mm-huge_memoryc-rework-the-function-do_huge_pmd_numa_page-slightly.patch
mm-huge_memoryc-remove-redundant-pagecompound-check.patch
mm-huge_memoryc-remove-unused-macro-transparent_hugepage_debug_cow_flag.patch
mm-huge_memoryc-use-helper-function-migration_entry_to_page.patch
khugepaged-use-helper-function-range_in_vma-in-collapse_pte_mapped_thp.patch
khugepaged-remove-unnecessary-out-label-in-collapse_huge_page.patch
khugepaged-remove-meaningless-pte_present-check-in-khugepaged_scan_pmd.patch
mm-hugeltb-remove-redundant-vm_bug_on-in-region_add.patch
mm-hugeltb-simplify-the-return-code-of-__vma_reservation_common.patch
mm-hugeltb-clarify-chg-freed-wont-go-negative-in-hugetlb_unreserve_pages.patch
mm-hugeltb-handle-the-error-case-in-hugetlb_fix_reserve_counts.patch
mm-hugetlb-remove-unused-variable-pseudo_vma-in-remove_inode_hugepages.patch
mm-migratec-make-putback_movable_page-static.patch
mm-migratec-remove-unnecessary-rc-=-migratepage_success-check-in-else-case.patch
mm-migratec-fix-potential-indeterminate-pte-entry-in-migrate_vma_insert_page.patch
mm-migratec-use-helper-migrate_vma_collect_skip-in-migrate_vma_collect_hole.patch
revert-mm-migrate-skip-shared-exec-thp-for-numa-balancing.patch
ksm-remove-redundant-vm_bug_on_page-on-stable_tree_search.patch
ksm-use-get_ksm_page_nolock-to-get-ksm-page-in-remove_rmap_item_from_tree.patch
ksm-remove-dedicated-macro-ksm_flag_mask.patch
ksm-fix-potential-missing-rmap_item-for-stable_node.patch