[PATCH] namespaces: utsname: switch to using uts namespaces

Replace references to system_utsname to the per-process uts namespace
where appropriate.  This includes things like uname.

Changes: Per Eric Biederman's comments, use the per-process uts namespace
	for ELF_PLATFORM, sunrpc, and parts of net/ipv4/ipconfig.c

[jdike@addtoit.com: UML fix]
[clg@fr.ibm.com: cleanup]
[akpm@osdl.org: build fix]
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Kirill Korotaev <dev@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Andrey Savochkin <saw@sw.ru>
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 21 insertions, 16 deletions

diff --git a/arch/parisc/hpux/sys_hpux.c b/arch/parisc/hpux/sys_hpux.c
index cb69727027ae..2e2dc4f2c853 100644
--- a/arch/parisc/hpux/sys_hpux.c
+++ b/arch/parisc/hpux/sys_hpux.c
@@ -266,16 +266,21 @@ static int hpux_uname(struct hpux_utsname *name)
 
         down_read(&uts_sem);
 
-        error = __copy_to_user(&name->sysname,&system_utsname.sysname,HPUX_UTSLEN-1);
-        error |= __put_user(0,name->sysname+HPUX_UTSLEN-1);
-        error |= __copy_to_user(&name->nodename,&system_utsname.nodename,HPUX_UTSLEN-1);
-        error |= __put_user(0,name->nodename+HPUX_UTSLEN-1);
-        error |= __copy_to_user(&name->release,&system_utsname.release,HPUX_UTSLEN-1);
-        error |= __put_user(0,name->release+HPUX_UTSLEN-1);
-        error |= __copy_to_user(&name->version,&system_utsname.version,HPUX_UTSLEN-1);
-        error |= __put_user(0,name->version+HPUX_UTSLEN-1);
-        error |= __copy_to_user(&name->machine,&system_utsname.machine,HPUX_UTSLEN-1);
-        error |= __put_user(0,name->machine+HPUX_UTSLEN-1);
+        error = __copy_to_user(&name->sysname, &utsname()->sysname,
+                               HPUX_UTSLEN - 1);
+        error |= __put_user(0, name->sysname + HPUX_UTSLEN - 1);
+        error |= __copy_to_user(&name->nodename, &utsname()->nodename,
+                                HPUX_UTSLEN - 1);
+        error |= __put_user(0, name->nodename + HPUX_UTSLEN - 1);
+        error |= __copy_to_user(&name->release, &utsname()->release,
+                                HPUX_UTSLEN - 1);
+        error |= __put_user(0, name->release + HPUX_UTSLEN - 1);
+        error |= __copy_to_user(&name->version, &utsname()->version,
+                                HPUX_UTSLEN - 1);
+        error |= __put_user(0, name->version + HPUX_UTSLEN - 1);
+        error |= __copy_to_user(&name->machine, &utsname()->machine,
+                                HPUX_UTSLEN - 1);
+        error |= __put_user(0, name->machine + HPUX_UTSLEN - 1);
 
         up_read(&uts_sem);
 
@@ -373,8 +378,8 @@ int hpux_utssys(char *ubuf, int n, int type)
                 /*  TODO:  print a warning about using this?  */
                 down_write(&uts_sem);
                 error = -EFAULT;
-                if (!copy_from_user(system_utsname.sysname, ubuf, len)) {
-                        system_utsname.sysname[len] = 0;
+                if (!copy_from_user(utsname()->sysname, ubuf, len)) {
+                        utsname()->sysname[len] = 0;
                         error = 0;
                 }
                 up_write(&uts_sem);
@@ -400,8 +405,8 @@ int hpux_utssys(char *ubuf, int n, int type)
                 /*  TODO:  print a warning about this?  */
                 down_write(&uts_sem);
                 error = -EFAULT;
-                if (!copy_from_user(system_utsname.release, ubuf, len)) {
-                        system_utsname.release[len] = 0;
+                if (!copy_from_user(utsname()->release, ubuf, len)) {
+                        utsname()->release[len] = 0;
                         error = 0;
                 }
                 up_write(&uts_sem);
@@ -422,13 +427,13 @@ int hpux_getdomainname(char *name, int len)
         
         down_read(&uts_sem);
         
-        nlen = strlen(system_utsname.domainname) + 1;
+        nlen = strlen(utsname()->domainname) + 1;
 
         if (nlen < len)
                 len = nlen;
         if(len > __NEW_UTS_LEN)
                 goto done;
-        if(copy_to_user(name, system_utsname.domainname, len))
+        if(copy_to_user(name, utsname()->domainname, len))
                 goto done;
         err = 0;
 done: