* [tip:WIP.x86/pti-upstream 38/50] arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared
@ 2017-12-16 23:35 kbuild test robot
2017-12-17 2:50 ` Andy Lutomirski
0 siblings, 1 reply; 2+ messages in thread
From: kbuild test robot @ 2017-12-16 23:35 UTC (permalink / raw)
To: Andy Lutomirski; +Cc: kbuild-all, linux-kernel, tipbuild, Thomas Gleixner
[-- Attachment #1: Type: text/plain, Size: 2025 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/pti-upstream
head: 78e4da51f7c77587cc6f419af4f63a21b289bdb7
commit: 7e482cfe4a23ead21215423c4566c8516ba21025 [38/50] x86/pti: Put the LDT in its own PGD if PTI is on
config: i386-randconfig-h0-12170619 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
git checkout 7e482cfe4a23ead21215423c4566c8516ba21025
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
In file included from arch/x86//kernel/apic/ipi.c:16:0:
arch/x86/include/asm/mmu_context.h: In function 'ldt_slot_va':
>> arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared (first use in this function)
return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
^~~~~~~~~~~~~
arch/x86/include/asm/mmu_context.h:73:18: note: each undeclared identifier is reported only once for each function it appears in
--
In file included from arch/x86//kernel/cpu/common.c:22:0:
arch/x86/include/asm/mmu_context.h: In function 'ldt_slot_va':
>> arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared (first use in this function)
return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
^~~~~~~~~~~~~
arch/x86/include/asm/mmu_context.h:73:18: note: each undeclared identifier is reported only once for each function it appears in
In file included from arch/x86//kernel/cpu/common.c:22:0:
arch/x86/include/asm/mmu_context.h:74:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
vim +/LDT_BASE_ADDR +73 arch/x86/include/asm/mmu_context.h
70
71 static inline void *ldt_slot_va(int slot)
72 {
> 73 return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
74 }
75
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [tip:WIP.x86/pti-upstream 38/50] arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared
2017-12-16 23:35 [tip:WIP.x86/pti-upstream 38/50] arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared kbuild test robot
@ 2017-12-17 2:50 ` Andy Lutomirski
0 siblings, 0 replies; 2+ messages in thread
From: Andy Lutomirski @ 2017-12-17 2:50 UTC (permalink / raw)
To: kbuild test robot
Cc: Andy Lutomirski, kbuild-all, linux-kernel, tipbuild, Thomas Gleixner
On Sat, Dec 16, 2017 at 3:35 PM, kbuild test robot
<fengguang.wu@intel.com> wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/pti-upstream
> head: 78e4da51f7c77587cc6f419af4f63a21b289bdb7
> commit: 7e482cfe4a23ead21215423c4566c8516ba21025 [38/50] x86/pti: Put the LDT in its own PGD if PTI is on
> config: i386-randconfig-h0-12170619 (attached as .config)
> compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
> reproduce:
> git checkout 7e482cfe4a23ead21215423c4566c8516ba21025
> # save the attached .config to linux build tree
> make ARCH=i386
>
> All errors (new ones prefixed by >>):
>
> In file included from arch/x86//kernel/apic/ipi.c:16:0:
> arch/x86/include/asm/mmu_context.h: In function 'ldt_slot_va':
>>> arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared (first use in this function)
> return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
> ^~~~~~~~~~~~~
> arch/x86/include/asm/mmu_context.h:73:18: note: each undeclared identifier is reported only once for each function it appears in
> --
> In file included from arch/x86//kernel/cpu/common.c:22:0:
> arch/x86/include/asm/mmu_context.h: In function 'ldt_slot_va':
>>> arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared (first use in this function)
> return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
> ^~~~~~~~~~~~~
> arch/x86/include/asm/mmu_context.h:73:18: note: each undeclared identifier is reported only once for each function it appears in
> In file included from arch/x86//kernel/cpu/common.c:22:0:
> arch/x86/include/asm/mmu_context.h:74:1: warning: control reaches end of non-void function [-Wreturn-type]
> }
> ^
>
> vim +/LDT_BASE_ADDR +73 arch/x86/include/asm/mmu_context.h
>
> 70
> 71 static inline void *ldt_slot_va(int slot)
> 72 {
> > 73 return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
> 74 }
> 75
>
I would fix this like this:
index b7ffd45b22f7..3c7042877e63 100644
--- a/arch/x86/include/asm/mmu_context.h
+++ b/arch/x86/include/asm/mmu_context.h
@@ -70,7 +70,11 @@ struct ldt_struct {
static inline void *ldt_slot_va(int slot)
{
+#ifdef CONFIG_X86_64
return (void *)(LDT_BASE_ADDR + LDT_SLOT_STRIDE * slot);
+#else
+ BUG();
+#endif
}
Ingo or Thomas, want to do that manually? It's probably easier than
folding in a patch.
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2017-12-16 23:35 [tip:WIP.x86/pti-upstream 38/50] arch/x86/include/asm/mmu_context.h:73:18: error: 'LDT_BASE_ADDR' undeclared kbuild test robot
2017-12-17 2:50 ` Andy Lutomirski
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