mempolicy.c (d033a308d81ec83908760a15a841c2bd0d5e0ea3) mempolicy.c (18a2f371f5edf41810f6469cb9be39931ef9deb9)
1/*
2 * Simple NUMA memory policy for the Linux kernel.
3 *
4 * Copyright 2003,2004 Andi Kleen, SuSE Labs.
5 * (C) Copyright 2005 Christoph Lameter, Silicon Graphics, Inc.
6 * Subject to the GNU Public License, version 2.
7 *
8 * NUMA policy allows the user to give hints in which node(s) memory should

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2032 else
2033 mpol_rebind_policy(new, &mems, MPOL_REBIND_ONCE);
2034 }
2035 rcu_read_unlock();
2036 atomic_set(&new->refcnt, 1);
2037 return new;
2038}
2039
1/*
2 * Simple NUMA memory policy for the Linux kernel.
3 *
4 * Copyright 2003,2004 Andi Kleen, SuSE Labs.
5 * (C) Copyright 2005 Christoph Lameter, Silicon Graphics, Inc.
6 * Subject to the GNU Public License, version 2.
7 *
8 * NUMA policy allows the user to give hints in which node(s) memory should

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2032 else
2033 mpol_rebind_policy(new, &mems, MPOL_REBIND_ONCE);
2034 }
2035 rcu_read_unlock();
2036 atomic_set(&new->refcnt, 1);
2037 return new;
2038}
2039
2040/*
2041 * If *frompol needs [has] an extra ref, copy *frompol to *tompol ,
2042 * eliminate the * MPOL_F_* flags that require conditional ref and
2043 * [NOTE!!!] drop the extra ref. Not safe to reference *frompol directly
2044 * after return. Use the returned value.
2045 *
2046 * Allows use of a mempolicy for, e.g., multiple allocations with a single
2047 * policy lookup, even if the policy needs/has extra ref on lookup.
2048 * shmem_readahead needs this.
2049 */
2050struct mempolicy *__mpol_cond_copy(struct mempolicy *tompol,
2051 struct mempolicy *frompol)
2052{
2053 if (!mpol_needs_cond_ref(frompol))
2054 return frompol;
2055
2056 *tompol = *frompol;
2057 tompol->flags &= ~MPOL_F_SHARED; /* copy doesn't need unref */
2058 __mpol_put(frompol);
2059 return tompol;
2060}
2061
2062/* Slow path of a mempolicy comparison */
2063bool __mpol_equal(struct mempolicy *a, struct mempolicy *b)
2064{
2065 if (!a || !b)
2066 return false;
2067 if (a->mode != b->mode)
2068 return false;
2069 if (a->flags != b->flags)

--- 568 unchanged lines hidden --- 		2040/* Slow path of a mempolicy comparison */
2041bool __mpol_equal(struct mempolicy *a, struct mempolicy *b)
2042{
2043 if (!a || !b)
2044 return false;
2045 if (a->mode != b->mode)
2046 return false;
2047 if (a->flags != b->flags)

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