From 28b24c1fc8c22cabe5b8a16ffe6a61dfce51a1f2 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Tue, 14 Apr 2015 15:44:57 -0700 Subject: mm: cma: debugfs interface I've noticed that there is no interfaces exposed by CMA which would let me fuzz what's going on in there. This small patchset exposes some information out to userspace, plus adds the ability to trigger allocation and freeing from userspace. This patch (of 3): Implement a simple debugfs interface to expose information about CMA areas in the system. Useful for testing/sanity checks for CMA since it was impossible to previously retrieve this information in userspace. Signed-off-by: Sasha Levin Acked-by: Joonsoo Kim Cc: Marek Szyprowski Cc: Laura Abbott Cc: Konrad Rzeszutek Wilk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'mm/Kconfig') diff --git a/mm/Kconfig b/mm/Kconfig index a03131b6ba8e..390214da4546 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -517,6 +517,12 @@ config CMA_DEBUG processing calls such as dma_alloc_from_contiguous(). This option does not affect warning and error messages. +config CMA_DEBUGFS + bool "CMA debugfs interface" + depends on CMA && DEBUG_FS + help + Turns on the DebugFS interface for CMA. + config CMA_AREAS int "Maximum count of the CMA areas" depends on CMA -- cgit v1.2.3