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perf/arch: Remove perf_sample_data::regs_user_copy

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struct perf_sample_data lives on-stack, we should be careful about it's
size. Furthermore, the pt_regs copy in there is only because x86_64 is a
trainwreck, solve it differently.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Link: https://lkml.kernel.org/r/20201030151955.258178461@infradead.org
This commit is contained in:
Peter Zijlstra
2020-10-30 12:14:21 +01:00
parent 09da9c8125
commit 76a4efa809
10 changed files with 22 additions and 31 deletions
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6
include/linux/perf_event.h
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@@ -1022,13 +1022,7 @@ struct perf_sample_data {
struct perf_callchain_entry *callchain;
u64 aux_size;
/*
* regs_user may point to task_pt_regs or to regs_user_copy, depending
* on arch details.
*/
struct perf_regs regs_user;
struct pt_regs regs_user_copy;
struct perf_regs regs_intr;
u64 stack_user_size;