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mm/swapfile.c: simplify the calculation of n_goal
Use min3() to simplify the comparison and make it more self-explaining. Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Hugh Dickins <hughd@google.com> Link: http://lkml.kernel.org/r/20200325220309.9803-1-richard.weiyang@gmail.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -994,11 +994,7 @@ int get_swap_pages(int n_goal, swp_entry_t swp_entries[], int entry_size)
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if (avail_pgs <= 0)
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goto noswap;
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if (n_goal > SWAP_BATCH)
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n_goal = SWAP_BATCH;
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if (n_goal > avail_pgs)
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n_goal = avail_pgs;
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n_goal = min3((long)n_goal, (long)SWAP_BATCH, avail_pgs);
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atomic_long_sub(n_goal * size, &nr_swap_pages);
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