diff options
| author | Kairui Song <kasong@tencent.com> | 2024-04-16 01:18:55 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-25 20:56:09 -0700 |
| commit | a4864671ca0bf51c8e78242951741df52c06766f (patch) | |
| tree | f335864cbcd5b7ea0525614f09ee6ab54c0cc144 /include/linux/xarray.h | |
| parent | b2ebcf9d3d5a0108f640d8c8200ece8848045725 (diff) | |
lib/xarray: introduce a new helper xas_get_order
It can be used after xas_load to check the order of loaded entries.
Compared to xa_get_order, it saves an XA_STATE and avoid a rewalk.
Added new test for xas_get_order, to make the test work, we have to export
xas_get_order with EXPORT_SYMBOL_GPL.
Also fix a sparse warning by checking the slot value with xa_entry instead
of accessing it directly, as suggested by Matthew Wilcox.
[kasong@tencent.com: simplify comment, sparse warning fix, per Matthew Wilcox]
Link: https://lkml.kernel.org/r/20240416071722.45997-4-ryncsn@gmail.com
Link: https://lkml.kernel.org/r/20240415171857.19244-4-ryncsn@gmail.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/xarray.h')
| -rw-r--r-- | include/linux/xarray.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/xarray.h b/include/linux/xarray.h index cb571dfcf4b1..d9d479334c9e 100644 --- a/include/linux/xarray.h +++ b/include/linux/xarray.h @@ -1548,6 +1548,7 @@ void xas_create_range(struct xa_state *); #ifdef CONFIG_XARRAY_MULTI int xa_get_order(struct xarray *, unsigned long index); +int xas_get_order(struct xa_state *xas); void xas_split(struct xa_state *, void *entry, unsigned int order); void xas_split_alloc(struct xa_state *, void *entry, unsigned int order, gfp_t); #else @@ -1556,6 +1557,11 @@ static inline int xa_get_order(struct xarray *xa, unsigned long index) return 0; } +static inline int xas_get_order(struct xa_state *xas) +{ + return 0; +} + static inline void xas_split(struct xa_state *xas, void *entry, unsigned int order) { |