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| 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 /arch/x86/kernel/setup.c | |
| parent | b2ebcf9d3d5a0108f640d8c8200ece8848045725 (diff) | |
| download | lwn-a4864671ca0bf51c8e78242951741df52c06766f.tar.gz lwn-a4864671ca0bf51c8e78242951741df52c06766f.zip | |
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 'arch/x86/kernel/setup.c')
0 files changed, 0 insertions, 0 deletions