[PATCH v2 01/07] cpuset cleanup not not operators

[Paul Jackson <pj@sgi.com>]

From: Paul Jackson <pj@sgi.com>

Since the test_bit() bit operator is boolean (return 0 or 1),
the double not "!!" operations needed to convert a scalar
(zero or not zero) to a boolean are not needed.

Signed-off-by: Paul Jackson <pj@sgi.com>

---

Andrew,

Please drop the patches:

 cpuset-memory-spread-basic-implementation.patch
 cpuset-memory-spread-basic-implementation-fix.patch
 cpuset-memory-spread-page-cache-implementation-and-hooks.patch
 cpuset-memory-spread-slab-cache-implementation.patch
 cpuset-memory-spread-slab-cache-optimizations.patch
 cpuset-memory-spread-slab-cache-optimizations-tidy.patch
 cpuset-memory-spread-slab-cache-hooks.patch

and replace with this patch set:

 [PATCH v2 01/07] cpuset_cleanup_not_not_ops
 [PATCH v2 02/07] cpuset_combine_atomic_inc_calls
 [PATCH v2 03/07] cpuset_mem_spread_new
 [PATCH v2 04/07] cpuset_mem_spread_page_cache
 [PATCH v2 05/07] cpuset_mem_spread_slab_cache
 [PATCH v2 06/07] cpuset_mem_spread_slab_optimize
 [PATCH v2 07/07] cpuset_mem_spread_mark_some_slab_caches

Changes in patch set from first version to this version v2:
 * dropped double not (!!) operators on cpuset flag bit tests
 * use more optimal atomic_inc_return() calls
 * change from one flag for all spreading to two
	flags, one for page cache, one for slab cache
 * change name of easily misused mpol_set_task_struct_flag()
	to less inviting mpol_fix_fork_child_flag(), to minimize
	risk someone will call on another task unsafely.
 * a tidy fix and a missing EXPORT_SYMBOL, thanks to Andrew
 * added xfs slab cache hooks for slab cache memory spreading
 * comment anticipating other file systems may need same hooks
 * further optimize kernel text size, for both NUMA and non-NUMA
	cases of the page_cache_alloc*() memory spreading hooks
 * comment why !in_interrupt() test needed to use memory spreading
 * comment why we dont need to check that node returned from the
	cpuset_mem_spread_node() is online

 kernel/cpuset.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

--- 2.6.16-rc1-mm5.orig/kernel/cpuset.c	2006-02-06 23:17:44.536051878 -0800
+++ 2.6.16-rc1-mm5/kernel/cpuset.c	2006-02-06 23:37:02.709481506 -0800
@@ -114,27 +114,27 @@ typedef enum {
 /* convenient tests for these bits */
 static inline int is_cpu_exclusive(const struct cpuset *cs)
 {
-	return !!test_bit(CS_CPU_EXCLUSIVE, &cs->flags);
+	return test_bit(CS_CPU_EXCLUSIVE, &cs->flags);
 }
 
 static inline int is_mem_exclusive(const struct cpuset *cs)
 {
-	return !!test_bit(CS_MEM_EXCLUSIVE, &cs->flags);
+	return test_bit(CS_MEM_EXCLUSIVE, &cs->flags);
 }
 
 static inline int is_removed(const struct cpuset *cs)
 {
-	return !!test_bit(CS_REMOVED, &cs->flags);
+	return test_bit(CS_REMOVED, &cs->flags);
 }
 
 static inline int notify_on_release(const struct cpuset *cs)
 {
-	return !!test_bit(CS_NOTIFY_ON_RELEASE, &cs->flags);
+	return test_bit(CS_NOTIFY_ON_RELEASE, &cs->flags);
 }
 
 static inline int is_memory_migrate(const struct cpuset *cs)
 {
-	return !!test_bit(CS_MEMORY_MIGRATE, &cs->flags);
+	return test_bit(CS_MEMORY_MIGRATE, &cs->flags);
 }
 
 /*

-- 
                          I won't rest till it's the best ...
                          Programmer, Linux Scalability
                          Paul Jackson <pj@sgi.com> 1.650.933.1373