SELinux: suppress a warning for 64k pages.

On PowerPC allmodconfig build we get this:

security/selinux/xfrm.c:214: warning: comparison is always false due to limited range of data type

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 7 insertions, 6 deletions

diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 36a191e7004e..e07603969033 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -211,26 +211,27 @@ static int selinux_xfrm_sec_ctx_alloc(struct xfrm_sec_ctx **ctxp,
         if (uctx->ctx_doi != XFRM_SC_ALG_SELINUX)
                 return -EINVAL;
 
-        if (uctx->ctx_len >= PAGE_SIZE)
+        str_len = uctx->ctx_len;
+        if (str_len >= PAGE_SIZE)
                 return -ENOMEM;
 
         *ctxp = ctx = kmalloc(sizeof(*ctx) +
-                              uctx->ctx_len + 1,
+                              str_len + 1,
                               GFP_KERNEL);
 
         if (!ctx)
                 return -ENOMEM;
 
         ctx->ctx_doi = uctx->ctx_doi;
-        ctx->ctx_len = uctx->ctx_len;
+        ctx->ctx_len = str_len;
         ctx->ctx_alg = uctx->ctx_alg;
 
         memcpy(ctx->ctx_str,
                uctx+1,
-               ctx->ctx_len);
-        ctx->ctx_str[ctx->ctx_len] = 0;
+               str_len);
+        ctx->ctx_str[str_len] = 0;
         rc = security_context_to_sid(ctx->ctx_str,
-                                     ctx->ctx_len,
+                                     str_len,
                                      &ctx->ctx_sid);
 
         if (rc)