xt_pknock: use `pr_err`

Replace some instances of `printk(KERN_ERR PKNOCK ...)`. We define
`pr_fmt`, so `pr_err` is equivalent.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>

diff --git a/extensions/pknock/xt_pknock.c b/extensions/pknock/xt_pknock.c
index 0fcbca78b00a0b3a2c3d9d09ae60405e35d4163f..e3d6a90a5a0d88b83b0904ac73901d9d22b3ee8e 100644 (file)
--- a/extensions/pknock/xt_pknock.c
+++ b/extensions/pknock/xt_pknock.c
@@ -1013,7 +1013,7 @@ out:
        return ret;
 }
 
-#define RETURN_ERR(err) do { printk(KERN_ERR PKNOCK err); return -EINVAL; } while (false)
+#define RETURN_ERR(err) do { pr_err(err); return -EINVAL; } while (false)
 
 static int pknock_mt_check(const struct xt_mtchk_param *par)
 {
@@ -1100,14 +1100,14 @@ static int __init xt_pknock_mt_init(void)
        if (gc_expir_time < DEFAULT_GC_EXPIRATION_TIME)
                gc_expir_time = DEFAULT_GC_EXPIRATION_TIME;
        if (request_module(crypto.algo) < 0) {
-               printk(KERN_ERR PKNOCK "request_module('%s') error.\n",
+               pr_err("request_module('%s') error.\n",
                         crypto.algo);
                return -ENXIO;
        }
 
        crypto.tfm = crypto_alloc_shash(crypto.algo, 0, 0);
        if (IS_ERR(crypto.tfm)) {
-               printk(KERN_ERR PKNOCK "failed to load transform for %s\n",
+               pr_err("failed to load transform for %s\n",
                                                crypto.algo);
                return PTR_ERR(crypto.tfm);
        }
@@ -1117,7 +1117,7 @@ static int __init xt_pknock_mt_init(void)
 
        pde = proc_mkdir("xt_pknock", init_net.proc_net);
        if (pde == NULL) {
-               printk(KERN_ERR PKNOCK "proc_mkdir() error in _init().\n");
+               pr_err("proc_mkdir() error in _init().\n");
                return -ENXIO;
        }
        return xt_register_match(&xt_pknock_mt_reg);