On Sat, Jul 20, 2013 at 7:27 PM, Thorsten Glaser <[email protected]> wrote:
> So good, so far. An ARAnyM log of the build (kernel
> messages) is attached. There’s one thing sticking out:
>
> [ 0.160000] WARNING: at /root/linux-3.10.1/init/main.c:698
> do_one_initcall+0x12e/0x13a()
> [ 0.160000] initcall param_sysfs_init+0x0/0x1a4 returned with disabled
> interrupts
>
> This seems to happen for several initcalls. Geert et al,
> can you have a look at them, they’re scary ☺
It only happens on multi-platform kernels, because of the following definition
of ALLOWINT:
#if defined(MACH_ATARI_ONLY)
/* block out HSYNC = ipl 2 on the atari */
#define ALLOWINT (~0x500)
#else
/* portable version */
#define ALLOWINT (~0x700)
#endif /* machine compilation types */
On an Atari-only kernel, flags is either 0x00c02204 or 0x00c02214.
Hence "flags & ~ALLOWINT" is "flags & 0x500" is always zero.
On a multi-platform kernel, flags is one of 0x00c02004, 0x00c02014,
0x00c02204, or 0x00c02214.
Hence "flags & ~ALLOWINT" is "flags & 0x700" is sometimes non-zero,
triggering the warning.
Anyone who sees a solution that doesn't involve adding a variable to hold
ALLOWINT?
We're already having a check for Q40 in arch_local_irq_enable()
(in multi-platfom kernels only).
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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