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| author | Xiyu Yang <xiyuyang19@fudan.edu.cn> | 2021-07-20 11:05:11 -0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-07-30 10:58:36 +0800 |
| commit | d5ee8e750c9449e9849a09ce6fb6b8adeaa66adc (patch) | |
| tree | 6df905f46fef4e34073c1dc2c6ac9407de3ded3a /include/linux/padata.h | |
| parent | 192b722f3866d3fb45b9e6a6ecd02ff09f2aefbe (diff) | |
| download | lwn-d5ee8e750c9449e9849a09ce6fb6b8adeaa66adc.tar.gz lwn-d5ee8e750c9449e9849a09ce6fb6b8adeaa66adc.zip | |
padata: Convert from atomic_t to refcount_t on parallel_data->refcnt
refcount_t type and corresponding API can protect refcounters from
accidental underflow and overflow and further use-after-free situations.
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Acked-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/linux/padata.h')
| -rw-r--r-- | include/linux/padata.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/padata.h b/include/linux/padata.h index a433f13fc4bf..495b16b6b4d7 100644 --- a/include/linux/padata.h +++ b/include/linux/padata.h @@ -12,6 +12,7 @@ #ifndef PADATA_H #define PADATA_H +#include <linux/refcount.h> #include <linux/compiler_types.h> #include <linux/workqueue.h> #include <linux/spinlock.h> @@ -96,7 +97,7 @@ struct parallel_data { struct padata_shell *ps; struct padata_list __percpu *reorder_list; struct padata_serial_queue __percpu *squeue; - atomic_t refcnt; + refcount_t refcnt; unsigned int seq_nr; unsigned int processed; int cpu; |