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SubjectRe: [patch] generic-pidhash-2.5.36-D4, BK-curr

On Thu, Sep 19, 2002 at 04:54:46AM +0200, Ingo Molnar wrote:

> - unified kernel/pid.c and kernel/idtag.c into kernel/pid.c.

> + /*
> + * Free the page if someone raced with us
> + * installing it:
> + */
> + if (cmpxchg(&map->page, NULL, page))
> + free_page(page);

Note that this piece breaks compilation for every arch that does not
have cmpxchg implementation.
This is the case with x86 (with CONFIG_X86_CMPXCHG undefined, e.g. i386),
ARM, CRIS, m68k, MIPS, MIPS64, PARISC, s390, SH, sparc32, UML (for x86).

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