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| author | Leon Romanovsky <leon@kernel.org> | 2023-12-12 10:04:59 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2023-12-12 10:04:59 +0300 |
| commit | afcda192dbab7df48dfedb1813a6d03bf6bd4996 (patch) | |
| tree | 270d0e74520e0f8d17da34bbdd8d91dec47f3585 /include/linux/kprobes.h | |
| parent | 07f830ae4913d0b986c8c0ff88a7d597948b9bd8 (diff) | |
| parent | d727d27db536faea7178290c677cc0567f647231 (diff) | |
| download | linux-afcda192dbab7df48dfedb1813a6d03bf6bd4996.tar.xz | |
Expose c0 and SW encap ICM for RDMA
These two series from Mark and Shun extend RDMA mlx5 API.
Mark's series provides c0 register used to match egress
traffic sent by local device.
Shun's series adds new type for ICM area.
Link: https://lore.kernel.org/all/cover.1701871118.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'include/linux/kprobes.h')
| -rw-r--r-- | include/linux/kprobes.h | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index ab1da3142b06..0ff44d6633e3 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -139,7 +139,7 @@ static inline bool kprobe_ftrace(struct kprobe *p) * */ struct kretprobe_holder { - struct kretprobe *rp; + struct kretprobe __rcu *rp; struct objpool_head pool; }; @@ -197,10 +197,8 @@ extern int arch_trampoline_kprobe(struct kprobe *p); #ifdef CONFIG_KRETPROBE_ON_RETHOOK static nokprobe_inline struct kretprobe *get_kretprobe(struct kretprobe_instance *ri) { - RCU_LOCKDEP_WARN(!rcu_read_lock_any_held(), - "Kretprobe is accessed from instance under preemptive context"); - - return (struct kretprobe *)READ_ONCE(ri->node.rethook->data); + /* rethook::data is non-changed field, so that you can access it freely. */ + return (struct kretprobe *)ri->node.rethook->data; } static nokprobe_inline unsigned long get_kretprobe_retaddr(struct kretprobe_instance *ri) { @@ -245,10 +243,7 @@ unsigned long kretprobe_trampoline_handler(struct pt_regs *regs, static nokprobe_inline struct kretprobe *get_kretprobe(struct kretprobe_instance *ri) { - RCU_LOCKDEP_WARN(!rcu_read_lock_any_held(), - "Kretprobe is accessed from instance under preemptive context"); - - return READ_ONCE(ri->rph->rp); + return rcu_dereference_check(ri->rph->rp, rcu_read_lock_any_held()); } static nokprobe_inline unsigned long get_kretprobe_retaddr(struct kretprobe_instance *ri) |