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author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2022-06-07 11:34:46 +0200 |
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committer | akpm <akpm@linux-foundation.org> | 2022-07-03 18:08:41 -0700 |
commit | f9863be49312aa1f566dca12603e33487965e6a4 (patch) | |
tree | a3dc293c0cf080c1468687cfb0e384d7f7d6ec96 /mm | |
parent | 8eb510db2125ab471967819d1f8749162588bba9 (diff) | |
download | linux-f9863be49312aa1f566dca12603e33487965e6a4.tar.bz2 |
mm/vmalloc: extend __alloc_vmap_area() with extra arguments
It implies that __alloc_vmap_area() allocates only from the global vmap
space, therefore a list-head and rb-tree, which represent a free vmap
space, are not passed as parameters to this function and are accessed
directly from this function.
Extend the __alloc_vmap_area() and other dependent functions to have a
possibility to allocate from different trees making an interface common
and not specific.
There is no functional change as a result of this patch.
Link: https://lkml.kernel.org/r/20220607093449.3100-3-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r-- | mm/vmalloc.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 2504c83814fe..5dce7593c075 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1233,15 +1233,15 @@ is_within_this_va(struct vmap_area *va, unsigned long size, * overhead. */ static __always_inline struct vmap_area * -find_vmap_lowest_match(unsigned long size, unsigned long align, - unsigned long vstart, bool adjust_search_size) +find_vmap_lowest_match(struct rb_root *root, unsigned long size, + unsigned long align, unsigned long vstart, bool adjust_search_size) { struct vmap_area *va; struct rb_node *node; unsigned long length; /* Start from the root. */ - node = free_vmap_area_root.rb_node; + node = root->rb_node; /* Adjust the search size for alignment overhead. */ length = adjust_search_size ? size + align - 1 : size; @@ -1369,8 +1369,9 @@ classify_va_fit_type(struct vmap_area *va, } static __always_inline int -adjust_va_to_fit_type(struct vmap_area *va, - unsigned long nva_start_addr, unsigned long size) +adjust_va_to_fit_type(struct rb_root *root, struct list_head *head, + struct vmap_area *va, unsigned long nva_start_addr, + unsigned long size) { struct vmap_area *lva = NULL; enum fit_type type = classify_va_fit_type(va, nva_start_addr, size); @@ -1383,7 +1384,7 @@ adjust_va_to_fit_type(struct vmap_area *va, * V NVA V * |---------------| */ - unlink_va_augment(va, &free_vmap_area_root); + unlink_va_augment(va, root); kmem_cache_free(vmap_area_cachep, va); } else if (type == LE_FIT_TYPE) { /* @@ -1461,8 +1462,7 @@ adjust_va_to_fit_type(struct vmap_area *va, augment_tree_propagate_from(va); if (lva) /* type == NE_FIT_TYPE */ - insert_vmap_area_augment(lva, &va->rb_node, - &free_vmap_area_root, &free_vmap_area_list); + insert_vmap_area_augment(lva, &va->rb_node, root, head); } return 0; @@ -1473,7 +1473,8 @@ adjust_va_to_fit_type(struct vmap_area *va, * Otherwise a vend is returned that indicates failure. */ static __always_inline unsigned long -__alloc_vmap_area(unsigned long size, unsigned long align, +__alloc_vmap_area(struct rb_root *root, struct list_head *head, + unsigned long size, unsigned long align, unsigned long vstart, unsigned long vend) { bool adjust_search_size = true; @@ -1493,7 +1494,7 @@ __alloc_vmap_area(unsigned long size, unsigned long align, if (align <= PAGE_SIZE || (align > PAGE_SIZE && (vend - vstart) == size)) adjust_search_size = false; - va = find_vmap_lowest_match(size, align, vstart, adjust_search_size); + va = find_vmap_lowest_match(root, size, align, vstart, adjust_search_size); if (unlikely(!va)) return vend; @@ -1507,7 +1508,7 @@ __alloc_vmap_area(unsigned long size, unsigned long align, return vend; /* Update the free vmap_area. */ - ret = adjust_va_to_fit_type(va, nva_start_addr, size); + ret = adjust_va_to_fit_type(root, head, va, nva_start_addr, size); if (WARN_ON_ONCE(ret)) return vend; @@ -1598,7 +1599,8 @@ static struct vmap_area *alloc_vmap_area(unsigned long size, retry: preload_this_cpu_lock(&free_vmap_area_lock, gfp_mask, node); - addr = __alloc_vmap_area(size, align, vstart, vend); + addr = __alloc_vmap_area(&free_vmap_area_root, &free_vmap_area_list, + size, align, vstart, vend); spin_unlock(&free_vmap_area_lock); /* @@ -3874,7 +3876,9 @@ retry: /* It is a BUG(), but trigger recovery instead. */ goto recovery; - ret = adjust_va_to_fit_type(va, start, size); + ret = adjust_va_to_fit_type(&free_vmap_area_root, + &free_vmap_area_list, + va, start, size); if (WARN_ON_ONCE(unlikely(ret))) /* It is a BUG(), but trigger recovery instead. */ goto recovery; |