From a720094ded8cbb303111035be91858011d2eac71 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Fri, 16 Nov 2012 09:37:58 +0000 Subject: mm: mempolicy: Hide MPOL_NOOP and MPOL_MF_LAZY from userspace for now The use of MPOL_NOOP and MPOL_MF_LAZY to allow an application to explicitly request lazy migration is a good idea but the actual API has not been well reviewed and once released we have to support it. For now this patch prevents an application using the services. This will need to be revisited. Signed-off-by: Mel Gorman --- mm/mempolicy.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'mm/mempolicy.c') diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 75d4600a5e92..a7a62fe7c280 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -252,7 +252,7 @@ static struct mempolicy *mpol_new(unsigned short mode, unsigned short flags, pr_debug("setting mode %d flags %d nodes[0] %lx\n", mode, flags, nodes ? nodes_addr(*nodes)[0] : -1); - if (mode == MPOL_DEFAULT || mode == MPOL_NOOP) { + if (mode == MPOL_DEFAULT) { if (nodes && !nodes_empty(*nodes)) return ERR_PTR(-EINVAL); return NULL; @@ -1186,7 +1186,7 @@ static long do_mbind(unsigned long start, unsigned long len, if (start & ~PAGE_MASK) return -EINVAL; - if (mode == MPOL_DEFAULT || mode == MPOL_NOOP) + if (mode == MPOL_DEFAULT) flags &= ~MPOL_MF_STRICT; len = (len + PAGE_SIZE - 1) & PAGE_MASK; @@ -1241,7 +1241,7 @@ static long do_mbind(unsigned long start, unsigned long len, flags | MPOL_MF_INVERT, &pagelist); err = PTR_ERR(vma); /* maybe ... */ - if (!IS_ERR(vma) && mode != MPOL_NOOP) + if (!IS_ERR(vma)) err = mbind_range(mm, start, end, new); if (!err) { @@ -2530,7 +2530,6 @@ static const char * const policy_modes[] = [MPOL_BIND] = "bind", [MPOL_INTERLEAVE] = "interleave", [MPOL_LOCAL] = "local", - [MPOL_NOOP] = "noop", /* should not actually be used */ }; @@ -2581,7 +2580,7 @@ int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context) break; } } - if (mode >= MPOL_MAX || mode == MPOL_NOOP) + if (mode >= MPOL_MAX) goto out; switch (mode) { -- cgit v1.2.3-59-g8ed1b