linux-kernel - [PATCH 1/2] perf_event: remove unused DEBUG_PERF_USE

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Message-Id: <20160830140834.6d1edf7abd9d95c02dae7820@arm.com>
Date:   Tue, 30 Aug 2016 14:08:34 -0500
From:   Kim Phillips <kim.phillips@....com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Arnd Bergmann <arnd@...db.de>, Tejun Heo <tj@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Ellerman <mpe@...erman.id.au>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH 1/2] perf_event: remove unused DEBUG_PERF_USE_VMALLOC

This 'DEBUG'-prefixed version of PERF_USE_VMALLOC is not used anywhere.
It appears to be leftovers from commit 906010b "perf_event: Provide
vmalloc() based mmap() backing" that introduced it.

Not sure what commit cb30711 "perf_event: Don't allow vmalloc() backed
perf on powerpc" was trying to do with it either.

Signed-off-by: Kim Phillips <kim.phillips@....com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Michael Ellerman <mpe@...erman.id.au>
---
 init/Kconfig | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index cac3f09..934a61f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1707,19 +1707,6 @@ config PERF_EVENTS
 
 	  Say Y if unsure.
 
-config DEBUG_PERF_USE_VMALLOC
-	default n
-	bool "Debug: use vmalloc to back perf mmap() buffers"
-	depends on PERF_EVENTS && DEBUG_KERNEL && !PPC
-	select PERF_USE_VMALLOC
-	help
-	 Use vmalloc memory to back perf mmap() buffers.
-
-	 Mostly useful for debugging the vmalloc code on platforms
-	 that don't require it.
-
-	 Say N if unsure.
-
 endmenu
 
 config VM_EVENT_COUNTERS
-- 
2.9.3