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| author | Liam R. Howlett <Liam.Howlett@oracle.com> | 2023-05-18 10:55:15 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-09 16:25:28 -0700 |
| commit | f0a1f866aba1ca62ef6f17d1c441eba65f2d6845 (patch) | |
| tree | 9ee27204dd3cb994f7a947d66f22814d577f4338 /lib | |
| parent | 89f499f35c11af61ba7075ddc23209d10805a25a (diff) | |
| download | linux-stable-f0a1f866aba1ca62ef6f17d1c441eba65f2d6845.tar.gz linux-stable-f0a1f866aba1ca62ef6f17d1c441eba65f2d6845.tar.bz2 linux-stable-f0a1f866aba1ca62ef6f17d1c441eba65f2d6845.zip | |
maple_tree: add debug BUG_ON and WARN_ON variants
Add debug macros to dump the maple state and/or the tree for both warning
and bug_on calls.
Link: https://lkml.kernel.org/r/20230518145544.1722059-7-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: David Binderman <dcb314@hotmail.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Vernon Yang <vernon2gm@gmail.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/maple_tree.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index dfa0271101d2..ff16b6c0ac08 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -240,12 +240,12 @@ static inline void mas_set_err(struct ma_state *mas, long err) mas->node = MA_ERROR(err); } -static inline bool mas_is_ptr(struct ma_state *mas) +static inline bool mas_is_ptr(const struct ma_state *mas) { return mas->node == MAS_ROOT; } -static inline bool mas_is_start(struct ma_state *mas) +static inline bool mas_is_start(const struct ma_state *mas) { return mas->node == MAS_START; } @@ -7246,4 +7246,34 @@ done: } EXPORT_SYMBOL_GPL(mt_validate); +void mas_dump(const struct ma_state *mas) +{ + pr_err("MAS: tree=%p enode=%p ", mas->tree, mas->node); + if (mas_is_none(mas)) + pr_err("(MAS_NONE) "); + else if (mas_is_ptr(mas)) + pr_err("(MAS_ROOT) "); + else if (mas_is_start(mas)) + pr_err("(MAS_START) "); + else if (mas_is_paused(mas)) + pr_err("(MAS_PAUSED) "); + + pr_err("[%u] index=%lx last=%lx\n", mas->offset, mas->index, mas->last); + pr_err(" min=%lx max=%lx alloc=%p, depth=%u, flags=%x\n", + mas->min, mas->max, mas->alloc, mas->depth, mas->mas_flags); + if (mas->index > mas->last) + pr_err("Check index & last\n"); +} +EXPORT_SYMBOL_GPL(mas_dump); + +void mas_wr_dump(const struct ma_wr_state *wr_mas) +{ + pr_err("WR_MAS: node=%p r_min=%lx r_max=%lx\n", + wr_mas->node, wr_mas->r_min, wr_mas->r_max); + pr_err(" type=%u off_end=%u, node_end=%u, end_piv=%lx\n", + wr_mas->type, wr_mas->offset_end, wr_mas->node_end, + wr_mas->end_piv); +} +EXPORT_SYMBOL_GPL(mas_wr_dump); + #endif /* CONFIG_DEBUG_MAPLE_TREE */ |