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Commit 4c2a7e72 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Linus Torvalds
Browse files

utsns: extract creeate_uts_ns() 



create_uts_ns() will be used by C/R to create fresh uts_ns.

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Acked-by: default avatarSerge Hallyn <serue@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent dca4a979

kernel/utsname.c

+11 −2
Original line number Diff line number Diff line
@@ -15,6 +15,16 @@ 
#include <linux/err.h>

#include <linux/slab.h>



static struct uts_namespace *create_uts_ns(void)

{

	struct uts_namespace *uts_ns;



	uts_ns = kmalloc(sizeof(struct uts_namespace), GFP_KERNEL);

	if (uts_ns)

		kref_init(&uts_ns->kref);

	return uts_ns;

}



/*

 * Clone a new ns copying an original utsname, setting refcount to 1

 * @old_ns: namespace to clone
@@ -24,14 +34,13 @@ static struct uts_namespace *clone_uts_ns(struct uts_namespace *old_ns) 
{

	struct uts_namespace *ns;



	ns = kmalloc(sizeof(struct uts_namespace), GFP_KERNEL);

	ns = create_uts_ns();

	if (!ns)

		return ERR_PTR(-ENOMEM);



	down_read(&uts_sem);

	memcpy(&ns->name, &old_ns->name, sizeof(ns->name));

	up_read(&uts_sem);

	kref_init(&ns->kref);

	return ns;

}