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SubjectRe: 2.1.114 fails build on i386
Date
David S. Miller wrote:
>
> This fixes it.

Not for me :-). See below...

> The GCC bug case only applies when the top level
> structure has a final element which is an empty "{ }" element, which
> is no longer the case.

Doesn't seem to matter where the empty "{ }" element appears in the
task structure initializer: gcc-2.7.2.3 took a signal 11 error with
no accompanying error message when compiling
linux/arch/i386/kernel/init_task.c for the non-SMP case with INIT_LOCKS
defined to be SPIN_LOCK_UNLOCKED (which is the effect of your patch).
That's why I sent a followup to my own message advising that that
wouldn't work :-).

> --- include/linux/sched.h.~2~ Mon Aug 3 14:53:23 1998
> +++ include/linux/sched.h Mon Aug 3 16:26:00 1998
> @@ -322,16 +322,6 @@
>
> #define DEF_PRIORITY (20*HZ/100) /* 200 ms time slices */
>
> -/* Note: This is very ugly I admit. But some versions of gcc will
> - * dump core when an empty structure constant is parsed at
> - * the end of a large top level structure initialization. -DaveM
> - */
> -#ifdef __SMP__
> -#define INIT_LOCKS SPIN_LOCK_UNLOCKED
> -#else
> -#define INIT_LOCKS
> -#endif
> -
> /*
> * INIT_TASK is used to set up the first task table, touch at
> * your own risk!. Base=0, limit=0x1fffff (=2MB)
> @@ -367,8 +357,13 @@
> /* fs */ &init_fs, \
> /* files */ &init_files, \
> /* mm */ &init_mm, \
> -/* signals */ INIT_LOCKS, &init_signals, {{0}}, {{0}}, NULL, &init_task.sigqueue, 0, 0, \
> +/* signals */ SPIN_LOCK_UNLOCKED, &init_signals, {{0}}, {{0}}, NULL, &init_task.sigqueue, 0, 0, \
> }
> +/* Note: Do not allow a SPIN_LOCK_UNLOCKED to be at the end of the
> + * task structure, some versions of gcc will dump core when an
> + * empty structure constant is parsed at the end of a large top-
> + * level structure initialization. -DaveM
> + */
>
> union task_union {
> struct task_struct task;

--
Bob Tracy | "They couldn't hit an elephant at this dist- "
Firewall Security Corp. | - Last words of Union General John Sedgwick,
rct@frus.com | Battle of Spotsylvania Court House, U.S. Civil War

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