linux-kernel - Re: linux-next: Tree for Sep 18 (objtool)

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Message-ID: <20190919165118.lffzvrl5efbpnvux@treble>
Date:   Thu, 19 Sep 2019 11:51:18 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Mark Brown <broonie@...nel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: linux-next: Tree for Sep 18 (objtool)

On Wed, Sep 18, 2019 at 09:04:21PM -0700, Randy Dunlap wrote:
> On 9/18/19 3:10 PM, Mark Brown wrote:
> > Hi all,
> > 
> > Changes since 20190917:
> > 
> 
> on x86_64:
> 
> drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool: i915_gem_execbuffer2_ioctl()+0x2fb: call to gen8_canonical_addr() with UACCESS enabled
> 
> using
> > gcc --version
> gcc (SUSE Linux) 7.4.1 20190424 [gcc-7-branch revision 270538]
> 
> .o and .config files are attached.

Does this fix it?

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index b5f6937369ea..7e111cb5b14b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -284,7 +284,7 @@ struct i915_execbuffer {
  * canonical form [63:48] == [47]."
  */
 #define GEN8_HIGH_ADDRESS_BIT 47
-static inline u64 gen8_canonical_addr(u64 address)
+static __always_inline u64 gen8_canonical_addr(u64 address)
 {
 	return sign_extend64(address, GEN8_HIGH_ADDRESS_BIT);
 }

-- 
Josh