From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: Mark Brown <broonie@kernel.org>,
Linux Next Mailing List <linux-next@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: linux-next: Tree for Sep 18 (objtool)
Date: Thu, 19 Sep 2019 14:40:36 -0500 [thread overview]
Message-ID: <20190919194036.smeaapv6armqswub@treble> (raw)
In-Reply-To: <8dc0ef20-c776-bfdc-de31-1759125c77e9@infradead.org>
On Thu, Sep 19, 2019 at 12:21:46PM -0700, Randy Dunlap wrote:
> On 9/19/19 9:51 AM, Josh Poimboeuf wrote:
> > 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?
>
> This patch produces this message:
>
> drivers/gpu/drm/i915/gem/i915_gem_execbuffer.o: warning: objtool: i915_gem_execbuffer2_ioctl()+0x2fb: call to sign_extend64.constprop.20() with UACCESS enabled
Ha, ok. I guess we have to __always_inline that one too...
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);
}
diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index cf074bce3eb3..fae10792b198 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -151,7 +151,7 @@ static inline __s32 sign_extend32(__u32 value, int index)
* @value: value to sign extend
* @index: 0 based bit index (0<=index<64) to sign bit
*/
-static inline __s64 sign_extend64(__u64 value, int index)
+static __always_inline __s64 sign_extend64(__u64 value, int index)
{
__u8 shift = 63 - index;
return (__s64)(value << shift) >> shift;
next prev parent reply other threads:[~2019-09-19 19:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-18 22:10 linux-next: Tree for Sep 18 Mark Brown
2019-09-19 4:04 ` linux-next: Tree for Sep 18 (objtool) Randy Dunlap
2019-09-19 16:51 ` Josh Poimboeuf
2019-09-19 19:21 ` Randy Dunlap
2019-09-19 19:40 ` Josh Poimboeuf [this message]
2019-09-19 21:09 ` Randy Dunlap
2019-09-23 9:20 ` Peter Zijlstra
2019-09-23 12:49 ` Josh Poimboeuf
2019-09-23 13:33 ` Peter Zijlstra
2019-09-23 14:16 ` Josh Poimboeuf
2019-09-23 14:28 ` Peter Zijlstra
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