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https://github.com/torvalds/linux
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0edaf86cf1
Lots of code does node = next_node(node, XXX); if (node == MAX_NUMNODES) node = first_node(XXX); so create next_node_in() to do this and use it in various places. [mhocko@suse.com: use next_node_in() helper] Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Michal Hocko <mhocko@kernel.org> Signed-off-by: Michal Hocko <mhocko@suse.com> Cc: Xishi Qiu <qiuxishi@huawei.com> Cc: Joonsoo Kim <js1304@gmail.com> Cc: David Rientjes <rientjes@google.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Hui Zhu <zhuhui@xiaomi.com> Cc: Wang Xiaoqiang <wangxq10@lzu.edu.cn> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
30 lines
617 B
C
30 lines
617 B
C
#include <linux/nodemask.h>
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#include <linux/module.h>
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#include <linux/random.h>
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int __next_node_in(int node, const nodemask_t *srcp)
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{
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int ret = __next_node(node, srcp);
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if (ret == MAX_NUMNODES)
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ret = __first_node(srcp);
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return ret;
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}
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EXPORT_SYMBOL(__next_node_in);
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#ifdef CONFIG_NUMA
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/*
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* Return the bit number of a random bit set in the nodemask.
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* (returns NUMA_NO_NODE if nodemask is empty)
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*/
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int node_random(const nodemask_t *maskp)
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{
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int w, bit = NUMA_NO_NODE;
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w = nodes_weight(*maskp);
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if (w)
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bit = bitmap_ord_to_pos(maskp->bits,
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get_random_int() % w, MAX_NUMNODES);
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return bit;
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}
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#endif
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