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| author | Peter Zijlstra <peterz@infradead.org> | 2024-11-04 14:39:15 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-04 09:42:29 +0100 |
| commit | 6c8b0b835f003647e593c08331a4dd2150d5eb0e (patch) | |
| tree | f91dc078e1f3e14c042142bbe9555e438cd9c8a6 /include/linux | |
| parent | 8f4c4963d28349cbf1920ab71edea8276f6ac4c5 (diff) | |
| download | lwn-6c8b0b835f003647e593c08331a4dd2150d5eb0e.tar.gz lwn-6c8b0b835f003647e593c08331a4dd2150d5eb0e.zip | |
perf/core: Simplify perf_pmu_register()
Using the previously introduced perf_pmu_free() and a new IDR helper,
simplify the perf_pmu_register error paths.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/20241104135518.198937277@infradead.org
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/idr.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/idr.h b/include/linux/idr.h index da5f5fa4a3a6..cd729be369b3 100644 --- a/include/linux/idr.h +++ b/include/linux/idr.h @@ -15,6 +15,7 @@ #include <linux/radix-tree.h> #include <linux/gfp.h> #include <linux/percpu.h> +#include <linux/cleanup.h> struct idr { struct radix_tree_root idr_rt; @@ -124,6 +125,22 @@ void *idr_get_next_ul(struct idr *, unsigned long *nextid); void *idr_replace(struct idr *, void *, unsigned long id); void idr_destroy(struct idr *); +struct __class_idr { + struct idr *idr; + int id; +}; + +#define idr_null ((struct __class_idr){ NULL, -1 }) +#define take_idr_id(id) __get_and_null(id, idr_null) + +DEFINE_CLASS(idr_alloc, struct __class_idr, + if (_T.id >= 0) idr_remove(_T.idr, _T.id), + ((struct __class_idr){ + .idr = idr, + .id = idr_alloc(idr, ptr, start, end, gfp), + }), + struct idr *idr, void *ptr, int start, int end, gfp_t gfp); + /** * idr_init_base() - Initialise an IDR. * @idr: IDR handle. |