Re: linux-next: Tree for Mar 27 (kbuild)

Randy Dunlap
2020-03-31T02:10:11Z

On 3/27/20 8:52 AM, Randy Dunlap wrote:
> On 3/27/20 1:07 AM, Stephen Rothwell wrote:
>> Hi all,
>>
>> Changes since 20200326:
>>
>
> on i386, UML defconfig build fails with: (mostly get_user() variants)
>

Hi Yamada-san,

Al Viro identified these build errors as due to:

Buggered-by: 1a908babcb144 (x86: replace arch macros from compiler with CONFIG_X86_{32,64})

If the intention is to check i386/x86_64 excluding UML, testing
CONFIG_X86_{32,64} is simpler.

Which is not true, since uml/x86 configs bloody well *do* have CONFIG_X86_{32,64}
defined. See arch/x86/um/Kconfig; and yes, it does need those, as well as
arch/x86/Kconfig.cpu.

and they are still happening (on UML on i386 defconfig).

>
> CC kernel/signal.o
> In file included from ../include/linux/kernel.h:15:0,
> from ../include/asm-generic/bug.h:19,
> from ./arch/um/include/generated/asm/bug.h:1,
> from ../include/linux/bug.h:5,
> from ../include/linux/mmdebug.h:5,
> from ../include/linux/gfp.h:5,
> from ../include/linux/slab.h:15,
> from ../kernel/signal.c:14:
> ../kernel/signal.c: In function 'print_fatal_signal':
> ../kernel/signal.c:1250:33: error: 'struct pt_regs' has no member named 'ip'
> pr_info("code at %08lx: ", regs->ip);
> ^
> ../include/linux/printk.h:310:34: note: in definition of macro 'pr_info'
> printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
> ^~~~~~~~~~~
> In file included from ../arch/um/include/asm/uaccess.h:39:0,
> from ../include/linux/uaccess.h:11,
> from ../include/linux/sched/task.h:11,
> from ../kernel/signal.c:20:
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:196:28: note: in definition of macro 'get_user'
> const void __user *__p = (ptr); \
> ^~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:93:66: note: in definition of macro 'access_ok'
> #define access_ok(addr, size) __access_ok((unsigned long)(addr),(size))
> ^~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:158:19: note: in definition of macro '__get_user'
> switch (sizeof(*(ptr))) { \
> ^~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:47: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^~
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:51: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:163:32: note: in definition of macro '__get_user'
> (x) = *(__force __typeof__(*(ptr)) *) &__x; \
> ^~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:47: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^~
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:51: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:170:32: note: in definition of macro '__get_user'
> (x) = *(__force __typeof__(*(ptr)) *) &__x; \
> ^~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:47: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^~
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:51: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:177:32: note: in definition of macro '__get_user'
> (x) = *(__force __typeof__(*(ptr)) *) &__x; \
> ^~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:47: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^~
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:209:51: note: in definition of macro '__get_user_fn'
> #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> ^
> ../include/asm-generic/uaccess.h:199:3: note: in expansion of macro '__get_user'
> __get_user((x), (__typeof__(*(ptr)) __user *)__p) :\
> ^~~~~~~~~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:184:32: note: in definition of macro '__get_user'
> (x) = *(__force __typeof__(*(ptr)) *) &__x; \
> ^~~
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
> ../kernel/signal.c:1256:45: error: 'struct pt_regs' has no member named 'ip'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^
> ../include/asm-generic/uaccess.h:200:24: note: in definition of macro 'get_user'
> ((x) = (__typeof__(*(ptr)))0,-EFAULT); \
> ^~~
> ../include/asm-generic/uaccess.h:200:31: warning: left-hand operand of comma expression has no effect [-Wunused-value]
> ((x) = (__typeof__(*(ptr)))0,-EFAULT); \
> ^
> ../kernel/signal.c:1256:8: note: in expansion of macro 'get_user'
> if (get_user(insn, (unsigned char *)(regs->ip + i)))
> ^~~~~~~~
>
>

--
~Randy
Reported-by: Randy Dunlap <rdunlap@infradead.org>