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mm/mempolicy: unify the create() func for bind/interleave/prefer-many policies 

As they all do the same thing: sanity check and save nodemask info, create
one mpol_new_nodemask() to reduce redundancy.

Link: https://lkml.kernel.org/r/1627970362-61305-6-git-send-email-feng.tang@intel.com
Signed-off-by: Feng Tang <feng.tang@intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Feng Tang 2021-09-02 15:00:19 -07:00 committed by Linus Torvalds
parent a38a59fdfa
commit be897d48a9
1 changed files with 4 additions and 20 deletions
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24
mm/mempolicy.c
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@ -192,7 +192,7 @@ static void mpol_relative_nodemask(nodemask_t *ret, const nodemask_t *orig,
nodes_onto(*ret, tmp, *rel);
}
static int mpol_new_interleave(struct mempolicy *pol, const nodemask_t *nodes)
static int mpol_new_nodemask(struct mempolicy *pol, const nodemask_t *nodes)
{
if (nodes_empty(*nodes))
return -EINVAL;
@ -210,22 +210,6 @@ static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes)
return 0;
}
static int mpol_new_preferred_many(struct mempolicy *pol, const nodemask_t *nodes)
{
if (nodes_empty(*nodes))
return -EINVAL;
pol->nodes = *nodes;
return 0;
}
static int mpol_new_bind(struct mempolicy *pol, const nodemask_t *nodes)
{
if (nodes_empty(*nodes))
return -EINVAL;
pol->nodes = *nodes;
return 0;
}
/*
* mpol_set_nodemask is called after mpol_new() to set up the nodemask, if
* any, for the new policy. mpol_new() has already validated the nodes
@ -405,7 +389,7 @@ static const struct mempolicy_operations mpol_ops[MPOL_MAX] = {
.rebind = mpol_rebind_default,
},
[MPOL_INTERLEAVE] = {
.create = mpol_new_interleave,
.create = mpol_new_nodemask,
.rebind = mpol_rebind_nodemask,
},
[MPOL_PREFERRED] = {
@ -413,14 +397,14 @@ static const struct mempolicy_operations mpol_ops[MPOL_MAX] = {
.rebind = mpol_rebind_preferred,
},
[MPOL_BIND] = {
.create = mpol_new_bind,
.create = mpol_new_nodemask,
.rebind = mpol_rebind_nodemask,
},
[MPOL_LOCAL] = {
.rebind = mpol_rebind_default,
},
[MPOL_PREFERRED_MANY] = {
.create = mpol_new_preferred_many,
.create = mpol_new_nodemask,
.rebind = mpol_rebind_preferred,
},
};