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36d4b36b69
The functions are pretty thin wrappers around find_bit engine, and keeping them in c-file prevents compiler from small_const_nbits() optimization, which must take place for all systems with MAX_NUMNODES less than BITS_PER_LONG (default is 16 for me). Moving them to header file doesn't blow up the kernel size: add/remove: 1/2 grow/shrink: 9/5 up/down: 968/-88 (880) CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Michael Ellerman <mpe@ellerman.id.au> CC: Paul Mackerras <paulus@samba.org> CC: Rasmus Villemoes <linux@rasmusvillemoes.dk> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: linuxppc-dev@lists.ozlabs.org Signed-off-by: Yury Norov <yury.norov@gmail.com>
23 lines
492 B
C
23 lines
492 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/nodemask.h>
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#include <linux/module.h>
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#include <linux/random.h>
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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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