The patch titled
Subject: mm/swap: remove unused global variable nr_swapper_spaces
has been added to the -mm tree. Its filename is
mm-swap-remove-unused-global-variable-nr_swapper_spaces.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-swap-remove-unused-global-variable-nr_swapper_spaces.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-swap-remove-unused-global-variable-nr_swapper_spaces.patch
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/swap: remove unused global variable nr_swapper_spaces
Since commit b6038942480e ("mm: memcg: add swapcache stat for memcg v2"),
the last user of nr_swapper_spaces is gone. So we remove this unused one.
Link: https://lkml.kernel.org/r/20210520134022.1370406-5-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap_state.c | 3 ---
1 file changed, 3 deletions(-)
--- a/mm/swap_state.c~mm-swap-remove-unused-global-variable-nr_swapper_spaces
+++ a/mm/swap_state.c
@@ -37,7 +37,6 @@ static const struct address_space_operat
};
struct address_space *swapper_spaces[MAX_SWAPFILES] __read_mostly;
-static unsigned int nr_swapper_spaces[MAX_SWAPFILES] __read_mostly;
static bool enable_vma_readahead __read_mostly = true;
#define SWAP_RA_WIN_SHIFT (PAGE_SHIFT / 2)
@@ -685,7 +684,6 @@ int init_swap_address_space(unsigned int
/* swap cache doesn't use writeback related tags */
mapping_set_no_writeback_tags(space);
}
- nr_swapper_spaces[type] = nr;
swapper_spaces[type] = spaces;
return 0;
@@ -694,7 +692,6 @@ int init_swap_address_space(unsigned int
void exit_swap_address_space(unsigned int type)
{
kvfree(swapper_spaces[type]);
- nr_swapper_spaces[type] = 0;
swapper_spaces[type] = NULL;
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-swapfile-use-percpu_ref-to-serialize-against-concurrent-swapoff.patch
swap-fix-do_swap_page-race-with-swapoff.patch
mm-swap-remove-confusing-checking-for-non_swap_entry-in-swap_ra_info.patch
mm-shmem-fix-shmem_swapin-race-with-swapoff.patch
mm-swapfile-move-get_swap_page_of_type-under-config_hibernation.patch
mm-swap-remove-unused-local-variable-nr_shadows.patch
mm-swap_slotsc-delete-meaningless-forward-declarations.patch
mm-swap-remove-unused-global-variable-nr_swapper_spaces.patch
mm-huge_memoryc-remove-dedicated-macro-hpage_cache_index_mask.patch
mm-huge_memoryc-use-page-deferred_list.patch
mm-huge_memoryc-add-missing-read-only-thp-checking-in-transparent_hugepage_enabled.patch
mm-huge_memoryc-add-missing-read-only-thp-checking-in-transparent_hugepage_enabled-v4.patch
mm-huge_memoryc-remove-unnecessary-tlb_remove_page_size-for-huge-zero-pmd.patch
mm-huge_memoryc-dont-discard-hugepage-if-other-processes-are-mapping-it.patch
