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MIPS: VPE: Remove vpe_getuid and vpe_getgid

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The linux build-bot recently reported a build error in arch/mips/kernel/vpe.c

     tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git for-linus
     head:   261000a56b
     commit: 261000a56b [4/4] userns:  userns: Remove UIDGID_STRICT_TYPE_CHECKS
     config: make ARCH=mips maltaaprp_defconfig

     All error/warnings:

        arch/mips/kernel/vpe.c: In function 'vpe_open':
     >> arch/mips/kernel/vpe.c:1086:9: error: incompatible types when assigning to type 'unsigned int' from type 'kuid_t'
     >> arch/mips/kernel/vpe.c:1087:9: error: incompatible types when assigning to type 'unsigned int' from type 'kgid_t'

     vim +1086 arch/mips/kernel/vpe.c

     863abad4 Jesper Juhl   2010-10-30  1080			return -ENOMEM;
     863abad4 Jesper Juhl   2010-10-30  1081  		}
     e01402b1 Ralf Baechle  2005-07-14  1082  		v->plen = P_SIZE;
     e01402b1 Ralf Baechle  2005-07-14  1083  		v->load_addr = NULL;
     e01402b1 Ralf Baechle  2005-07-14  1084  		v->len = 0;
     e01402b1 Ralf Baechle  2005-07-14  1085
     d76b0d9b David Howells 2008-11-14 @1086		v->uid = filp->f_cred->fsuid;
     d76b0d9b David Howells 2008-11-14 @1087  		v->gid = filp->f_cred->fsgid;
     2600990e Ralf Baechle  2006-04-05  1088
     2600990e Ralf Baechle  2006-04-05  1089		v->cwd[0] = 0;
     2600990e Ralf Baechle  2006-04-05  1090 	 	ret = getcwd(v->cwd, VPE_PATH_MAX);

When examining the code to see what v->uid and v->gid were used for I
discovered that the only users in the kernel are vpe_getuid and
vpe_getgid, and that vpe_getuid and vpe_getgid are never called.

So instead of proposing a conversion to use kuid_t and kgid_t instead
of unsigned int/int as I normally would let's just kill this dead code
so no one has to worry about it further.

Deng-Cheng Zhu said:

This is a good catch. vpe_get[u|g]id was originally used by KSPD which
has been removed.

Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Reviewed-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2014-01-21 10:28:15 -08:00
parent 261000a56b
commit f58437f1f9
2 changed files with 0 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/include/asm/vpe.h
View File

@ -30,8 +30,6 @@ struct vpe_notifications {
extern int vpe_notify(int index, struct vpe_notifications *notify);
extern void *vpe_get_shared(int index);
extern int vpe_getuid(int index);
extern int vpe_getgid(int index);
extern char *vpe_getcwd(int index);
#endif /* _ASM_VPE_H */

28
arch/mips/kernel/vpe.c
View File

@ -105,7 +105,6 @@ struct vpe {
unsigned long len;
char *pbuffer;
unsigned long plen;
unsigned int uid, gid;
char cwd[VPE_PATH_MAX];
unsigned long __start;
@ -1083,9 +1082,6 @@ static int vpe_open(struct inode *inode, struct file *filp)
v->load_addr = NULL;
v->len = 0;
v->uid = filp->f_cred->fsuid;
v->gid = filp->f_cred->fsgid;
v->cwd[0] = 0;
ret = getcwd(v->cwd, VPE_PATH_MAX);
if (ret < 0)
@ -1269,30 +1265,6 @@ void *vpe_get_shared(int index)
EXPORT_SYMBOL(vpe_get_shared);
int vpe_getuid(int index)
{
struct vpe *v;
if ((v = get_vpe(index)) == NULL)
return -1;
return v->uid;
}
EXPORT_SYMBOL(vpe_getuid);
int vpe_getgid(int index)
{
struct vpe *v;
if ((v = get_vpe(index)) == NULL)
return -1;
return v->gid;
}
EXPORT_SYMBOL(vpe_getgid);
int vpe_notify(int index, struct vpe_notifications *notify)
{
struct vpe *v;