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Date:	Mon, 22 Dec 2014 13:11:13 +0200
From:	Oded Gabbay <>
To:	Alexander Deucher <>
CC:	<>, <>,
	"John Bridgman" <>,
	Dana Elifaz <>,
	"Huang Ying" <>, LKP ML <>
Subject: [PATCH] drm/radeon: Try to init amdkfd only if 64 bit kernel

amdkfd driver can be compiled only in 64-bit kernel. Therefore, there is no
point in trying to initialize amdkfd in 32-bit kernel.

In addition, in case of specific configuration of 32-bit kernel, no modules and
random kernel base, the symbol_request function doesn't work as expected - It
doesn't return NULL if the symbol doesn't exists. That makes the kernel panic.
Therefore, the as amdkfd doesn't compile in 32-bit kernel, the best way is just
to return false immediately.

Signed-off-by: Oded Gabbay <>
 drivers/gpu/drm/radeon/radeon_kfd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_kfd.c b/drivers/gpu/drm/radeon/radeon_kfd.c
index 242fd8b..cb77e5c 100644
--- a/drivers/gpu/drm/radeon/radeon_kfd.c
+++ b/drivers/gpu/drm/radeon/radeon_kfd.c
@@ -101,6 +101,7 @@ static const struct kgd2kfd_calls *kgd2kfd;
 bool radeon_kfd_init(void)
+#ifdef CONFIG_X86_64
 	bool (*kgd2kfd_init_p)(unsigned, const struct kfd2kgd_calls*,
 				const struct kgd2kfd_calls**);
@@ -117,6 +118,9 @@ bool radeon_kfd_init(void)
 	return true;
+	return false;
 void radeon_kfd_fini(void)

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