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bedf02f45b
With the latest change of separating vports into their own modules, it is necessary to export all public functions in linux/compat/ directory. Also, we should prefix functions which replace the upstream ones with 'rpl_' and others with 'ovs_'. This will prevent the linker error when vport modules use those functions in the future. e.g., the to be merged vport-stt module will use the flex_array_* functions which are not currently exported. Co-authored-by: Tuan Nguyen <tuan.nguyen@veriksystems.com> Signed-off-by: Alex Wang <alexw@nicira.com> Acked-by: Jesse Gross <jesse@nicira.com>
28 lines
504 B
C
28 lines
504 B
C
#include <linux/kernel.h>
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#include <asm/div64.h>
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#include <linux/module.h>
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#include <linux/reciprocal_div.h>
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/*
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* For a description of the algorithm please have a look at
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* include/linux/reciprocal_div.h
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*/
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struct reciprocal_value rpl_reciprocal_value(u32 d)
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{
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struct reciprocal_value R;
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u64 m;
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int l;
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l = fls(d - 1);
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m = ((1ULL << 32) * ((1ULL << l) - d));
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do_div(m, d);
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++m;
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R.m = (u32)m;
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R.sh1 = min(l, 1);
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R.sh2 = max(l - 1, 0);
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return R;
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}
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EXPORT_SYMBOL_GPL(rpl_reciprocal_value);
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