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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-30 16:00:03 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-30 16:00:03 (GMT) |
commit | 35926ff5fba8245bd1c6ac04155048f6f89232b1 (patch) | |
tree | 9afc520f47e29cb3cd80462fe62858f17b1c6cfb | |
parent | b612a0553714c6b9744ad0d03f10cac78f3a84b1 (diff) | |
download | linux-fsl-qoriq-35926ff5fba8245bd1c6ac04155048f6f89232b1.tar.xz |
Revert "cpusets: randomize node rotor used in cpuset_mem_spread_node()"
This reverts commit 0ac0c0d0f837c499afd02a802f9cf52d3027fa3b, which
caused cross-architecture build problems for all the wrong reasons.
IA64 already added its own version of __node_random(), but the fact is,
there is nothing architectural about the function, and the original
commit was just badly done. Revert it, since no fix is forthcoming.
Requested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | arch/x86/mm/numa.c | 17 | ||||
-rw-r--r-- | include/linux/bitmap.h | 1 | ||||
-rw-r--r-- | include/linux/nodemask.h | 8 | ||||
-rw-r--r-- | kernel/fork.c | 4 | ||||
-rw-r--r-- | lib/bitmap.c | 2 |
5 files changed, 1 insertions, 31 deletions
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index 10c27bb..550df48 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -2,7 +2,6 @@ #include <linux/topology.h> #include <linux/module.h> #include <linux/bootmem.h> -#include <linux/random.h> #ifdef CONFIG_DEBUG_PER_CPU_MAPS # define DBG(x...) printk(KERN_DEBUG x) @@ -66,19 +65,3 @@ const struct cpumask *cpumask_of_node(int node) } EXPORT_SYMBOL(cpumask_of_node); #endif - -/* - * Return the bit number of a random bit set in the nodemask. - * (returns -1 if nodemask is empty) - */ -int __node_random(const nodemask_t *maskp) -{ - int w, bit = -1; - - w = nodes_weight(*maskp); - if (w) - bit = bitmap_ord_to_pos(maskp->bits, - get_random_int() % w, MAX_NUMNODES); - return bit; -} -EXPORT_SYMBOL(__node_random); diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 6fb2720..daf8c48 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -141,7 +141,6 @@ extern int bitmap_find_free_region(unsigned long *bitmap, int bits, int order); extern void bitmap_release_region(unsigned long *bitmap, int pos, int order); extern int bitmap_allocate_region(unsigned long *bitmap, int pos, int order); extern void bitmap_copy_le(void *dst, const unsigned long *src, int nbits); -extern int bitmap_ord_to_pos(const unsigned long *bitmap, int n, int bits); #define BITMAP_LAST_WORD_MASK(nbits) \ ( \ diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h index 8a8f1d0..dba35e4 100644 --- a/include/linux/nodemask.h +++ b/include/linux/nodemask.h @@ -66,8 +66,6 @@ * int num_online_nodes() Number of online Nodes * int num_possible_nodes() Number of all possible Nodes * - * int node_random(mask) Random node with set bit in mask - * * int node_online(node) Is some node online? * int node_possible(node) Is some node possible? * @@ -432,10 +430,6 @@ static inline void node_set_offline(int nid) node_clear_state(nid, N_ONLINE); nr_online_nodes = num_node_state(N_ONLINE); } - -#define node_random(mask) __node_random(&(mask)) -extern int __node_random(const nodemask_t *maskp); - #else static inline int node_state(int node, enum node_states state) @@ -466,8 +460,6 @@ static inline int num_node_state(enum node_states state) #define node_set_online(node) node_set_state((node), N_ONLINE) #define node_set_offline(node) node_clear_state((node), N_ONLINE) - -static inline int node_random(const nodemask_t mask) { return 0; } #endif #define node_online_map node_states[N_ONLINE] diff --git a/kernel/fork.c b/kernel/fork.c index bf9fef6..b6cce14 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1086,10 +1086,6 @@ static struct task_struct *copy_process(unsigned long clone_flags, } mpol_fix_fork_child_flag(p); #endif -#ifdef CONFIG_CPUSETS - p->cpuset_mem_spread_rotor = node_random(p->mems_allowed); - p->cpuset_slab_spread_rotor = node_random(p->mems_allowed); -#endif #ifdef CONFIG_TRACE_IRQFLAGS p->irq_events = 0; #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW diff --git a/lib/bitmap.c b/lib/bitmap.c index d7137e7..ffb78c9 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -672,7 +672,7 @@ static int bitmap_pos_to_ord(const unsigned long *buf, int pos, int bits) * * The bit positions 0 through @bits are valid positions in @buf. */ -int bitmap_ord_to_pos(const unsigned long *buf, int ord, int bits) +static int bitmap_ord_to_pos(const unsigned long *buf, int ord, int bits) { int pos = 0; |