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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-03-13 09:27:50 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-03-13 09:27:50 +0100 |
| commit | a1eccc574f977bd21a4ec8ac54bd73a2756bd281 (patch) | |
| tree | 4bf81d9f35b36aebb150128e865193bf8984bf8c /include/linux/trace_recursion.h | |
| parent | 3e853b9f89e4bcc8aa342fa350d83ff0df67d7e9 (diff) | |
| parent | fe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff) | |
Merge drm/drm-next into drm-misc-next
Backmerging to get v6.3-rc1 and sync with the other DRM trees.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Diffstat (limited to 'include/linux/trace_recursion.h')
| -rw-r--r-- | include/linux/trace_recursion.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/trace_recursion.h b/include/linux/trace_recursion.h index c303f7a114e9..d48cd92d2364 100644 --- a/include/linux/trace_recursion.h +++ b/include/linux/trace_recursion.h @@ -135,6 +135,21 @@ extern void ftrace_record_recursion(unsigned long ip, unsigned long parent_ip); # define do_ftrace_record_recursion(ip, pip) do { } while (0) #endif +#ifdef CONFIG_ARCH_WANTS_NO_INSTR +# define trace_warn_on_no_rcu(ip) \ + ({ \ + bool __ret = !rcu_is_watching(); \ + if (__ret && !trace_recursion_test(TRACE_RECORD_RECURSION_BIT)) { \ + trace_recursion_set(TRACE_RECORD_RECURSION_BIT); \ + WARN_ONCE(true, "RCU not on for: %pS\n", (void *)ip); \ + trace_recursion_clear(TRACE_RECORD_RECURSION_BIT); \ + } \ + __ret; \ + }) +#else +# define trace_warn_on_no_rcu(ip) false +#endif + /* * Preemption is promised to be disabled when return bit >= 0. */ @@ -144,6 +159,9 @@ static __always_inline int trace_test_and_set_recursion(unsigned long ip, unsign unsigned int val = READ_ONCE(current->trace_recursion); int bit; + if (trace_warn_on_no_rcu(ip)) + return -1; + bit = trace_get_context_bit() + start; if (unlikely(val & (1 << bit))) { /* |