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Commit 278d1ed6 authored by Rusty Russell's avatar Rusty Russell
Browse files

cpumask: make CONFIG_NR_CPUS always valid. 



Impact: cleanup

Currently we have NR_CPUS, which is 1 on UP, and CONFIG_NR_CPUS on
SMP.  If we make CONFIG_NR_CPUS always valid (and always 1 on !SMP),
we can skip the middleman.

This also allows us to find and check all the unaudited NR_CPUS usage
as we prepare for v. large NR_CPUS.

To avoid breaking every arch, we cheat and do this for the moment
in the header if the arch doesn't.

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarMike Travis <travis@sgi.com>
parent 33edcf13

include/linux/threads.h

+8 −8
Original line number Diff line number Diff line
@@ -8,17 +8,17 @@ 
 */



/*

 * Maximum supported processors that can run under SMP.  This value is

 * set via configure setting.  The maximum is equal to the size of the

 * bitmasks used on that platform, i.e. 32 or 64.  Setting this smaller

 * saves quite a bit of memory.

 * Maximum supported processors.  Setting this smaller saves quite a

 * bit of memory.  Use nr_cpu_ids instead of this except for static bitmaps.

 */

#ifdef CONFIG_SMP

#define NR_CPUS		CONFIG_NR_CPUS

#else

#define NR_CPUS		1

#ifndef CONFIG_NR_CPUS

/* FIXME: This should be fixed in the arch's Kconfig */

#define CONFIG_NR_CPUS	1

#endif



/* Places which use this should consider cpumask_var_t. */

#define NR_CPUS		CONFIG_NR_CPUS



#define MIN_THREADS_LEFT_FOR_ROOT 4



/*