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author	Peter Zijlstra <peterz@infradead.org>
	Fri, 30 Oct 2020 14:50:32 +0000 (15:50 +0100)
committer	Peter Zijlstra <peterz@infradead.org>
	Mon, 9 Nov 2020 17:12:33 +0000 (18:12 +0100)
commit	18ba4bd88b0e0e25cea00d922c7c1c21139a2cbf
tree	2f99dd2dedf21e53d329e16cdb615e2c234202bb	tree \| snapshot
parent	4effce8fe3a522c16838ddf766ed2ae478e34bd1	commit \| diff

perf: Reduce stack usage of perf_output_begin()

__perf_output_begin() has an on-stack struct perf_sample_data in the
unlikely case it needs to generate a LOST record. However, every call
to perf_output_begin() must already have a perf_sample_data on-stack.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201030151954.985416146@infradead.org

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arch/powerpc/perf/imc-pmu.c		diff \| blob \| history
arch/s390/kernel/perf_cpum_sf.c		diff \| blob \| history
arch/x86/events/intel/ds.c		diff \| blob \| history
include/linux/perf_event.h		diff \| blob \| history
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