linux-kernel - [PATCH] drm/i915/dmabuf: include asm/smp.h for cache operations

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Message-Id: <20211026083423.3461555-1-arnd@kernel.org>
Date:   Tue, 26 Oct 2021 10:34:16 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthew Auld <matthew.auld@...el.com>,
        Thomas Hellström 
        <thomas.hellstrom@...ux.intel.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Jason Ekstrand <jason@...kstrand.net>,
        Christian König <christian.koenig@....com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/i915/dmabuf: include asm/smp.h for cache operations

From: Arnd Bergmann <arnd@...db.de>

The x86 low-level cache management operations are declared in
asm/smp.h, so drivers that call into this code need to include
the header:

drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c:248:3: error: implicit declaration of function 'wbinvd_on_all_cpus' [-Werror,-Wimplicit-function-declaration]
                wbinvd_on_all_cpus();
                ^

Fixes: a035154da45d ("drm/i915/dmabuf: add paranoid flush-on-acquire")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
index 1adcd8e02d29..853a989fcb9b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
@@ -7,6 +7,7 @@
 #include <linux/dma-buf.h>
 #include <linux/highmem.h>
 #include <linux/dma-resv.h>
+#include <asm/smp.h>
 
 #include "i915_drv.h"
 #include "i915_gem_object.h"
-- 
2.29.2