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Message-ID: <CAD=FV=UYbMMr+obKqCvKpfpsJ-T5n6p9cZZsjFwF4kfTKM0Jqw@mail.gmail.com>
Date: Tue, 4 Feb 2020 14:13:39 -0800
From: Doug Anderson <dianders@...omium.org>
To: Anatoly Pugachev <matorola@...il.com>
Cc: Sparc kernel list <sparclinux@...r.kernel.org>,
Linux Kernel list <linux-kernel@...r.kernel.org>,
Daniel Thompson <daniel.thompson@...aro.org>
Subject: Re: [sparc64] unable to build kernel after bbfceba15f8 / "kdb: Get
rid of confusing diag msg from "rd" if current task has no regs"
Hi,
On Tue, Feb 4, 2020 at 1:14 PM Anatoly Pugachev <matorola@...il.com> wrote:
>
> Hello!
>
> After (bisected) bbfceba15f8d1260c328a254efc2b3f2deae4904 got
> mainline, i'm unable to build kernel with the following messages:
>
> ~/linux-2.6$ make -j olddefconfig; make kernel/debug/kdb/
> scripts/kconfig/conf --olddefconfig Kconfig
> #
> # No change to .config
> #
> CALL scripts/atomic/check-atomics.sh
> CALL scripts/checksyscalls.sh
> <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
> CC kernel/debug/kdb/kdb_main.o
> kernel/debug/kdb/kdb_main.c: In function ‘kdb_rd’:
> kernel/debug/kdb/kdb_main.c:1857:11: error: ‘dbg_reg_def’ undeclared
> (first use in this function); did you mean ‘dbg_reg_def_t’?
> 1857 | rsize = dbg_reg_def[i].size * 2;
> | ^~~~~~~~~~~
> | dbg_reg_def_t
> kernel/debug/kdb/kdb_main.c:1857:11: note: each undeclared identifier
> is reported only once for each function it appears in
> kernel/debug/kdb/kdb_main.c:1868:12: error: implicit declaration of
> function ‘dbg_get_reg’ [-Werror=implicit-function-declaration]
> 1868 | rname = dbg_get_reg(i, ®8, kdb_current_regs);
> | ^~~~~~~~~~~
> kernel/debug/kdb/kdb_main.c:1868:10: warning: assignment to ‘char *’
> from ‘int’ makes pointer from integer without a cast
> [-Wint-conversion]
> 1868 | rname = dbg_get_reg(i, ®8, kdb_current_regs);
> | ^
> kernel/debug/kdb/kdb_main.c:1874:10: warning: assignment to ‘char *’
> from ‘int’ makes pointer from integer without a cast
> [-Wint-conversion]
> 1874 | rname = dbg_get_reg(i, ®16, kdb_current_regs);
> | ^
> kernel/debug/kdb/kdb_main.c:1880:10: warning: assignment to ‘char *’
> from ‘int’ makes pointer from integer without a cast
> [-Wint-conversion]
> 1880 | rname = dbg_get_reg(i, ®32, kdb_current_regs);
> | ^
> kernel/debug/kdb/kdb_main.c:1886:10: warning: assignment to ‘char *’
> from ‘int’ makes pointer from integer without a cast
> [-Wint-conversion]
> 1886 | rname = dbg_get_reg(i, ®64, kdb_current_regs);
> | ^
> cc1: some warnings being treated as errors
> make[3]: *** [scripts/Makefile.build:266: kernel/debug/kdb/kdb_main.o] Error 1
> make[2]: *** [scripts/Makefile.build:503: kernel/debug/kdb] Error 2
> make[1]: *** [scripts/Makefile.build:503: kernel/debug] Error 2
> make: *** [Makefile:1681: kernel] Error 2
>
>
> reversing bbfceba15f8d with current git master branch - makes kernel
> compilable again.
>
> kernel config attached
Argh. Sorry about this. :( I'm not setup with a sparc compiler, but
I've simulated your results on arm64 by just commenting out the
definition of "DBG_MAX_REG_NUM" in "arch/arm64/include/asm/kgdb.h".
Hopefully:
https://lore.kernel.org/r/20200204141219.1.Ief3f3a7edbbd76165901b14813e90381c290786d@changeid
...will fix you?
-Doug
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