Prev: [PATCH 4/5] cpumask: remove struct cpumask definition when CONFIG_CPUMASK_OFFSTACK=y
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From: Rusty Russell on 25 Jun 2010 09:10
Now we're sure noone is using old cpumask operators, nor *cpumask, we can
allocate less bits safely. This reduces the memory usage of off-stack
cpumasks when CONFIG_CPUMASK_OFFSTACK=y but we don't have NR_CPUS actual
cpus.

Signed-off-by: Rusty Russell <rusty(a)rustcorp.com.au>
Cc: Arnd Bergmann <arnd(a)arndb.de>
Cc: anton(a)samba.org
Cc: KOSAKI Motohiro <kosaki.motohiro(a)jp.fujitsu.com>
Cc: Mike Travis <travis(a)sgi.com>
---
include/linux/cpumask.h | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -1014,13 +1014,11 @@ static inline int cpulist_parse(const ch
/**
* cpumask_size - size to allocate for a 'struct cpumask' in bytes
*
- * This will eventually be a runtime variable, depending on nr_cpu_ids.
+ * This can be a runtime variable, depending on nr_cpu_ids.
*/
static inline size_t cpumask_size(void)
{
- /* FIXME: Once all cpumask assignments are eliminated, this
- * can be nr_cpumask_bits */
- return BITS_TO_LONGS(NR_CPUS) * sizeof(long);
+ return BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long);
}

/*

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Prev: [PATCH 4/5] cpumask: remove struct cpumask definition when CONFIG_CPUMASK_OFFSTACK=y
Next: [PATCH 2/5] cpumask: make task_struct.cpus_allowed a cpumask_var_t