Re: linux-next: Tree for Apr 28

From: Nathan Chancellor
Date: Tue Apr 28 2020 - 21:35:22 EST

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On Tue, Apr 28, 2020 at 06:24:21PM -0700, Minchan Kim wrote:
> Hello,
>
> On Tue, Apr 28, 2020 at 12:04:59PM -0700, Nathan Chancellor wrote:
> > On Tue, Apr 28, 2020 at 06:10:06PM +1000, Stephen Rothwell wrote:
> > > Hi all,
> > >
> > > Changes since 20200424:
> > >
> > > The qcom tree still had its build failure for which I reverted a commit.
> > >
> > > The hwmon-staging tree gained a build failure for which I reverted
> > > a commit.
> > >
> > > The mac80211-next tree gained a build failure so I used the version
> > > from next-20200424.
> > >
> > > The drm-misc tree still had its build failure for which I disabled a
> > > COMPILE_TEST setting.
> > >
> > > The akpm-current tree gained a conflict against the risc-v tree.
> > >
> > > The akpm tree lost a patch that turned up elsewhere.
> > >
> > > Non-merge commits (relative to Linus' tree): 4451
> > > 5474 files changed, 151275 insertions(+), 63274 deletions(-)
> >
> > I am seeing the following build error on s390 defconfig, caused by
> > commit 743f242d65ec ("mm: support compat_sys_process_madvise").
> > Apologies if it has already been reported, I did a search of lore and
> > found nothing.
> >
> > Cheers,
> > Nathan
> >
> > $ make -j$(nproc) -s ARCH=s390 CROSS_COMPILE=s390x-linux- defconfig all
> > ...
> > mm/madvise.c: In function '__se_compat_sys_process_madvise':
> > ./include/linux/compiler.h:394:38: error: call to '__compiletime_assert_162' declared with attribute error: BUILD_BUG_ON failed: sizeof(unsigned long) > 4 && !__TYPE_IS_PTR(unsigned long)
> > 394 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> > | ^
> > ./include/linux/compiler.h:375:4: note: in definition of macro '__compiletime_assert'
> > 375 | prefix ## suffix(); \
> > | ^~~~~~
> > ./include/linux/compiler.h:394:2: note: in expansion of macro '_compiletime_assert'
> > 394 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> > | ^~~~~~~~~~~~~~~~~~~
> > ./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
> > 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
> > | ^~~~~~~~~~~~~~~~~~
> > ./include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
> > 50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
> > | ^~~~~~~~~~~~~~~~
> > ./arch/s390/include/asm/compat.h:18:2: note: in expansion of macro 'BUILD_BUG_ON'
> > 18 | BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
> > | ^~~~~~~~~~~~
> > ./include/linux/syscalls.h:110:27: note: in expansion of macro '__SC_DELOUSE'
> > 110 | #define __MAP3(m,t,a,...) m(t,a), __MAP2(m,__VA_ARGS__)
> > | ^
> > ./include/linux/syscalls.h:111:35: note: in expansion of macro '__MAP3'
> > 111 | #define __MAP4(m,t,a,...) m(t,a), __MAP3(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:112:35: note: in expansion of macro '__MAP4'
> > 112 | #define __MAP5(m,t,a,...) m(t,a), __MAP4(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:113:35: note: in expansion of macro '__MAP5'
> > 113 | #define __MAP6(m,t,a,...) m(t,a), __MAP5(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:114:22: note: in expansion of macro '__MAP6'
> > 114 | #define __MAP(n,...) __MAP##n(__VA_ARGS__)
> > | ^~~~~
> > ./arch/s390/include/asm/syscall_wrapper.h:80:36: note: in expansion of macro '__MAP'
> > 80 | long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
> > | ^~~~~
> > ./include/linux/compat.h:66:2: note: in expansion of macro 'COMPAT_SYSCALL_DEFINEx'
> > 66 | COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> > | ^~~~~~~~~~~~~~~~~~~~~~
> > mm/madvise.c:1314:1: note: in expansion of macro 'COMPAT_SYSCALL_DEFINE6'
> > 1314 | COMPAT_SYSCALL_DEFINE6(process_madvise, int, which, compat_pid_t, upid,
> > | ^~~~~~~~~~~~~~~~~~~~~~
> > ./include/linux/compiler.h:394:38: error: call to '__compiletime_assert_164' declared with attribute error: BUILD_BUG_ON failed: sizeof(unsigned long) > 4 && !__TYPE_IS_PTR(unsigned long)
> > 394 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> > | ^
> > ./include/linux/compiler.h:375:4: note: in definition of macro '__compiletime_assert'
> > 375 | prefix ## suffix(); \
> > | ^~~~~~
> > ./include/linux/compiler.h:394:2: note: in expansion of macro '_compiletime_assert'
> > 394 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> > | ^~~~~~~~~~~~~~~~~~~
> > ./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
> > 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
> > | ^~~~~~~~~~~~~~~~~~
> > ./include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
> > 50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
> > | ^~~~~~~~~~~~~~~~
> > ./arch/s390/include/asm/compat.h:18:2: note: in expansion of macro 'BUILD_BUG_ON'
> > 18 | BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
> > | ^~~~~~~~~~~~
> > ./include/linux/syscalls.h:108:27: note: in expansion of macro '__SC_DELOUSE'
> > 108 | #define __MAP1(m,t,a,...) m(t,a)
> > | ^
> > ./include/linux/syscalls.h:109:35: note: in expansion of macro '__MAP1'
> > 109 | #define __MAP2(m,t,a,...) m(t,a), __MAP1(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:110:35: note: in expansion of macro '__MAP2'
> > 110 | #define __MAP3(m,t,a,...) m(t,a), __MAP2(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:111:35: note: in expansion of macro '__MAP3'
> > 111 | #define __MAP4(m,t,a,...) m(t,a), __MAP3(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:112:35: note: in expansion of macro '__MAP4'
> > 112 | #define __MAP5(m,t,a,...) m(t,a), __MAP4(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:113:35: note: in expansion of macro '__MAP5'
> > 113 | #define __MAP6(m,t,a,...) m(t,a), __MAP5(m,__VA_ARGS__)
> > | ^~~~~~
> > ./include/linux/syscalls.h:114:22: note: in expansion of macro '__MAP6'
> > 114 | #define __MAP(n,...) __MAP##n(__VA_ARGS__)
> > | ^~~~~
> > ./arch/s390/include/asm/syscall_wrapper.h:80:36: note: in expansion of macro '__MAP'
> > 80 | long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
> > | ^~~~~
> > ./include/linux/compat.h:66:2: note: in expansion of macro 'COMPAT_SYSCALL_DEFINEx'
> > 66 | COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
> > | ^~~~~~~~~~~~~~~~~~~~~~
> > mm/madvise.c:1314:1: note: in expansion of macro 'COMPAT_SYSCALL_DEFINE6'
> > 1314 | COMPAT_SYSCALL_DEFINE6(process_madvise, int, which, compat_pid_t, upid,
> > | ^~~~~~~~~~~~~~~~~~~~~~
> > make[2]: *** [scripts/Makefile.build:266: mm/madvise.o] Error 1
> > make[2]: *** Waiting for unfinished jobs....
> > make[1]: *** [Makefile:1723: mm] Error 2
> > make[1]: *** Waiting for unfinished jobs....
> > ...
>
> Could you try this patch? I think it should fix it.
>
> From 3f993353c310a027f138d822a79ce49770fe6e50 Mon Sep 17 00:00:00 2001
> From: Minchan Kim <minchan@xxxxxxxxxx>
> Date: Tue, 28 Apr 2020 18:20:24 -0700
> Subject: [PATCH] mm: fix s390 compat build error
>
> Nathan reported build error with sys_compat_process_madvise.
> This patch should fix it.
>
> Reported-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>

Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> # build

> ---
> include/linux/compat.h | 5 +++--
> mm/madvise.c | 9 ++++++---
> 2 files changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/include/linux/compat.h b/include/linux/compat.h
> index 1134ba3e61d0..19c524513cbb 100644
> --- a/include/linux/compat.h
> +++ b/include/linux/compat.h
> @@ -820,9 +820,10 @@ asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
> unsigned long vlen, loff_t pos, rwf_t flags);
> #endif
>
> -asmlinkage ssize_t compat_sys_process_madvise(int which,
> +asmlinkage ssize_t compat_sys_process_madvise(compat_int_t which,
> compat_pid_t upid, const struct compat_iovec __user *vec,
> - unsigned long vlen, int behavior, unsigned long flags);
> + compat_ulong_t vlen, compat_int_t behavior,
> + compat_ulong_t flags);
>
> /*
> * Deprecated system calls which are still defined in
> diff --git a/mm/madvise.c b/mm/madvise.c
> index 8fec261457a6..99c06d5f0785 100644
> --- a/mm/madvise.c
> +++ b/mm/madvise.c
> @@ -1311,9 +1311,12 @@ SYSCALL_DEFINE6(process_madvise, int, which, pid_t, upid,
> }
>
> #ifdef CONFIG_COMPAT
> -COMPAT_SYSCALL_DEFINE6(process_madvise, int, which, compat_pid_t, upid,
> - const struct compat_iovec __user *, vec, unsigned long, vlen,
> - int, behavior, unsigned long, flags)
> +COMPAT_SYSCALL_DEFINE6(process_madvise, compat_int_t, which,
> + compat_pid_t, upid,
> + const struct compat_iovec __user *, vec,
> + compat_ulong_t, vlen,
> + compat_int_t, behavior,
> + compat_ulong_t, flags)
>
> {
> ssize_t ret;
> --
> 2.26.2.303.gf8c07b1a785-goog
>
>

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