The patch titled
cpuset: remove unneeded NODEMASK_ALLOC() in cpuset_sprintf_memlist()
has been removed from the -mm tree. Its filename was
cpuset-remove-unneeded-nodemask_alloc-in-cpuset_sprintf_memlist.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: cpuset: remove unneeded NODEMASK_ALLOC() in cpuset_sprintf_memlist()
From: Li Zefan <lizf@xxxxxxxxxxxxxx>
It's not necessary to copy cpuset->mems_allowed to a buffer allocated by
NODEMASK_ALLOC(). Just pass it to nodelist_scnprintf().
As spotted by Paul, a side effect is we fix a bug that the function can
return -ENOMEM but the caller doesn't expect negative return value.
Therefore change the return value of cpuset_sprintf_cpulist() and
cpuset_sprintf_memlist() from int to size_t.
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Acked-by: Paul Menage <menage@xxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Miao Xie <miaox@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/cpuset.c | 24 ++++++++----------------
1 file changed, 8 insertions(+), 16 deletions(-)
diff -puN kernel/cpuset.c~cpuset-remove-unneeded-nodemask_alloc-in-cpuset_sprintf_memlist kernel/cpuset.c
--- a/kernel/cpuset.c~cpuset-remove-unneeded-nodemask_alloc-in-cpuset_sprintf_memlist
+++ a/kernel/cpuset.c
@@ -1610,34 +1610,26 @@ out:
* across a page fault.
*/
-static int cpuset_sprintf_cpulist(char *page, struct cpuset *cs)
+static size_t cpuset_sprintf_cpulist(char *page, struct cpuset *cs)
{
- int ret;
+ size_t count;
mutex_lock(&callback_mutex);
- ret = cpulist_scnprintf(page, PAGE_SIZE, cs->cpus_allowed);
+ count = cpulist_scnprintf(page, PAGE_SIZE, cs->cpus_allowed);
mutex_unlock(&callback_mutex);
- return ret;
+ return count;
}
-static int cpuset_sprintf_memlist(char *page, struct cpuset *cs)
+static size_t cpuset_sprintf_memlist(char *page, struct cpuset *cs)
{
- NODEMASK_ALLOC(nodemask_t, mask, GFP_KERNEL);
- int retval;
-
- if (mask == NULL)
- return -ENOMEM;
+ size_t count;
mutex_lock(&callback_mutex);
- *mask = cs->mems_allowed;
+ count = nodelist_scnprintf(page, PAGE_SIZE, cs->mems_allowed);
mutex_unlock(&callback_mutex);
- retval = nodelist_scnprintf(page, PAGE_SIZE, *mask);
-
- NODEMASK_FREE(mask);
-
- return retval;
+ return count;
}
static ssize_t cpuset_common_file_read(struct cgroup *cont,
_
Patches currently in -mm which might be from lizf@xxxxxxxxxxxxxx are
origin.patch
cgroup-remove-the-ns_cgroup.patch
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