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mm: clean up and kernelify shrinker registration

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I can never remember what the function to register to receive VM pressure
is called.  I have to trace down from __alloc_pages() to find it.

It's called "set_shrinker()", and it needs Your Help.

1) Don't hide struct shrinker.  It contains no magic.
2) Don't allocate "struct shrinker".  It's not helpful.
3) Call them "register_shrinker" and "unregister_shrinker".
4) Call the function "shrink" not "shrinker".
5) Reduce the 17 lines of waffly comments to 13, but document it properly.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: David Chinner <dgc@sgi.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rusty Russell 2007-07-17 04:03:17 -07:00 • committed by Linus Torvalds
parent 5ad333eb66
commit 8e1f936b73
10 changed files with 81 additions and 74 deletions
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11
net/sunrpc/auth.c
View file

@ -543,17 +543,18 @@ rpcauth_uptodatecred(struct rpc_task *task)
test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0;
}
static struct shrinker *rpc_cred_shrinker;
static struct shrinker rpc_cred_shrinker = {
.shrink = rpcauth_cache_shrinker,
.seeks = DEFAULT_SEEKS,
};
void __init rpcauth_init_module(void)
{
rpc_init_authunix();
rpc_cred_shrinker = set_shrinker(DEFAULT_SEEKS, rpcauth_cache_shrinker);
register_shrinker(&rpc_cred_shrinker);
}
void __exit rpcauth_remove_module(void)
{
if (rpc_cred_shrinker != NULL)
remove_shrinker(rpc_cred_shrinker);
unregister_shrinker(&rpc_cred_shrinker);
}