linux-next: build warnings after merge of the tip tree

Stephen Rothwell
2017-06-23T04:19:18Z

Hi all,

After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
produced these warnings:

In file included from arch/x86/include/asm/paravirt_types.h:44:0,
from arch/x86/include/asm/ptrace.h:71,
from arch/x86/include/asm/math_emu.h:4,
from arch/x86/include/asm/processor.h:11,
from arch/x86/include/asm/cpufeature.h:4,
from arch/x86/include/asm/thread_info.h:52,
from include/linux/thread_info.h:37,
from arch/x86/include/asm/preempt.h:6,
from include/linux/preempt.h:80,
from include/linux/spinlock.h:50,
from include/linux/seqlock.h:35,
from include/linux/time.h:5,
from include/uapi/linux/timex.h:56,
from include/linux/timex.h:56,
from include/linux/clocksource.h:12,
from arch/x86/include/asm/vgtod.h:5,
from arch/x86/entry/vdso/vdso32/../vclock_gettime.c:15,
from arch/x86/entry/vdso/vdso32/vclock_gettime.c:32:
arch/x86/include/asm/pgtable.h: In function 'pte_flags_pkey':
arch/x86/include/asm/pgtable_types.h:56:43: warning: left shift count >= width of type [-Wshift-count-overflow]
#define _PAGE_PKEY_BIT0 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0)
^
arch/x86/include/asm/pgtable_types.h:68:26: note: in expansion of macro '_PAGE_PKEY_BIT0'
#define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \
^
arch/x86/include/asm/pgtable.h:1187:22: note: in expansion of macro '_PAGE_PKEY_MASK'
return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
^
arch/x86/include/asm/pgtable_types.h:57:43: warning: left shift count >= width of type [-Wshift-count-overflow]
#define _PAGE_PKEY_BIT1 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1)
^
arch/x86/include/asm/pgtable_types.h:69:5: note: in expansion of macro '_PAGE_PKEY_BIT1'
_PAGE_PKEY_BIT1 | \
^
arch/x86/include/asm/pgtable.h:1187:22: note: in expansion of macro '_PAGE_PKEY_MASK'
return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
^
arch/x86/include/asm/pgtable_types.h:58:43: warning: left shift count >= width of type [-Wshift-count-overflow]
#define _PAGE_PKEY_BIT2 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2)
^
arch/x86/include/asm/pgtable_types.h:70:5: note: in expansion of macro '_PAGE_PKEY_BIT2'
_PAGE_PKEY_BIT2 | \
^
arch/x86/include/asm/pgtable.h:1187:22: note: in expansion of macro '_PAGE_PKEY_MASK'
return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
^
arch/x86/include/asm/pgtable_types.h:59:43: warning: left shift count >= width of type [-Wshift-count-overflow]
#define _PAGE_PKEY_BIT3 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3)
^
arch/x86/include/asm/pgtable_types.h:71:5: note: in expansion of macro '_PAGE_PKEY_BIT3'
_PAGE_PKEY_BIT3)
^
arch/x86/include/asm/pgtable.h:1187:22: note: in expansion of macro '_PAGE_PKEY_MASK'
return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
^
In file included from include/linux/kasan.h:16:0,
from include/linux/slab.h:120,
from include/linux/irq.h:25,
from arch/x86/include/asm/hardirq.h:5,
from include/linux/hardirq.h:8,
from include/linux/interrupt.h:12,
from arch/x86/include/asm/mshyperv.h:5,
from arch/x86/entry/vdso/vdso32/../vclock_gettime.c:20,
from arch/x86/entry/vdso/vdso32/vclock_gettime.c:32:
arch/x86/include/asm/pgtable.h:1187:39: warning: right shift count >= width of type [-Wshift-count-overflow]
return (pte_flags & _PAGE_PKEY_MASK) >> _PAGE_BIT_PKEY_BIT0;
^

I have no idea what caused this.

--
Cheers,
Stephen Rothwell