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| author | Rob Clark <robdclark@chromium.org> | 2023-03-20 10:31:25 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2023-03-20 10:31:25 -0700 |
| commit | e752ab11dcb48353727ea26eefd740155e028865 (patch) | |
| tree | bbd47198be4e42bbf990096ca36e96f3da40cfb6 /include/linux/trace_recursion.h | |
| parent | 1844e680d56bb0c4e0489138f2b7ba2dc1c988e3 (diff) | |
| parent | 8bf6e20253b2d2b614f2c0b491f840e956fa6b05 (diff) | |
| download | linux-next-e752ab11dcb48353727ea26eefd740155e028865.tar.gz linux-next-e752ab11dcb48353727ea26eefd740155e028865.zip | |
Merge remote-tracking branch 'drm/drm-next' into msm-next
Merge drm-next into msm-next to pick up external clk and PM dependencies
for improved a6xx GPU reset sequence.
Signed-off-by: Rob Clark <robdclark@chromium.org>
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))) { /* |