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Date: Wed, 25 Jun 2014 14:53:14 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Rasmus Villemoes <linux@...musvillemoes.dk>
Cc: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>,
Don Mullis <don.mullis@...il.com>,
Dave Chinner <david@...morbit.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/4] lib: list_sort: Various minor improvements
On Tue, 24 Jun 2014 12:06:27 +0200 Rasmus Villemoes <linux@...musvillemoes.dk> wrote:
> Reading the source of lib/list_sort.c, I came up with a few possible
> improvements. I think 4/4 may be a bit controversial, but 1/4, 2/4 and
> 3/4 should be straightforward.
>
All looks OK to me.
We may as well do the pr_foo() conversion as well. As often happens,
the results are quite pleasing.
--- a/lib/list_sort.c~lib-list_sortc-convert-to-pr_foo
+++ a/lib/list_sort.c
@@ -1,3 +1,6 @@
+
+#define pr_fmt(fmt) "list_sort_test: " fmt
+
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/list_sort.h>
@@ -125,9 +128,8 @@ void list_sort(void *priv, struct list_h
}
if (lev > max_lev) {
if (unlikely(lev >= ARRAY_SIZE(part)-1)) {
- printk_once(KERN_DEBUG "list passed to"
- " list_sort() too long for"
- " efficiency\n");
+ pr_debug_once("list passed to list_sort() too "
+ "long for efficiency\n");
lev--;
}
max_lev = lev;
@@ -170,27 +172,25 @@ static struct debug_el **elts __initdata
static int __init check(struct debug_el *ela, struct debug_el *elb)
{
if (ela->serial >= TEST_LIST_LEN) {
- printk(KERN_ERR "list_sort_test: error: incorrect serial %d\n",
- ela->serial);
+ pr_err("error: incorrect serial %d\n", ela->serial);
return -EINVAL;
}
if (elb->serial >= TEST_LIST_LEN) {
- printk(KERN_ERR "list_sort_test: error: incorrect serial %d\n",
- elb->serial);
+ pr_err("error: incorrect serial %d\n", elb->serial);
return -EINVAL;
}
if (elts[ela->serial] != ela || elts[elb->serial] != elb) {
- printk(KERN_ERR "list_sort_test: error: phantom element\n");
+ pr_err("error: phantom element\n");
return -EINVAL;
}
if (ela->poison1 != TEST_POISON1 || ela->poison2 != TEST_POISON2) {
- printk(KERN_ERR "list_sort_test: error: bad poison: %#x/%#x\n",
- ela->poison1, ela->poison2);
+ pr_err("error: bad poison: %#x/%#x\n",
+ ela->poison1, ela->poison2);
return -EINVAL;
}
if (elb->poison1 != TEST_POISON1 || elb->poison2 != TEST_POISON2) {
- printk(KERN_ERR "list_sort_test: error: bad poison: %#x/%#x\n",
- elb->poison1, elb->poison2);
+ pr_err("error: bad poison: %#x/%#x\n",
+ elb->poison1, elb->poison2);
return -EINVAL;
}
return 0;
@@ -214,20 +214,18 @@ static int __init list_sort_test(void)
struct list_head *cur;
LIST_HEAD(head);
- printk(KERN_DEBUG "list_sort_test: start testing list_sort()\n");
+ pr_debug("start testing list_sort()\n");
elts = kcalloc(TEST_LIST_LEN, sizeof(*elts), GFP_KERNEL);
if (!elts) {
- printk(KERN_ERR "list_sort_test: error: cannot allocate "
- "memory\n");
+ pr_err("error: cannot allocate memory\n");
return err;
}
for (i = 0; i < TEST_LIST_LEN; i++) {
el = kmalloc(sizeof(*el), GFP_KERNEL);
if (!el) {
- printk(KERN_ERR "list_sort_test: error: cannot "
- "allocate memory\n");
+ pr_err("error: cannot allocate memory\n");
goto exit;
}
/* force some equivalencies */
@@ -247,42 +245,38 @@ static int __init list_sort_test(void)
int cmp_result;
if (cur->next->prev != cur) {
- printk(KERN_ERR "list_sort_test: error: list is "
- "corrupted\n");
+ pr_err("error: list is corrupted\n");
goto exit;
}
cmp_result = cmp(NULL, cur, cur->next);
if (cmp_result > 0) {
- printk(KERN_ERR "list_sort_test: error: list is not "
- "sorted\n");
+ pr_err("error: list is not sorted\n");
goto exit;
}
el = container_of(cur, struct debug_el, list);
el1 = container_of(cur->next, struct debug_el, list);
if (cmp_result == 0 && el->serial >= el1->serial) {
- printk(KERN_ERR "list_sort_test: error: order of "
- "equivalent elements not preserved\n");
+ pr_err("error: order of equivalent elements not "
+ "preserved\n");
goto exit;
}
if (check(el, el1)) {
- printk(KERN_ERR "list_sort_test: error: element check "
- "failed\n");
+ pr_err("error: element check failed\n");
goto exit;
}
count++;
}
if (head.prev != cur) {
- printk(KERN_ERR "list_sort_test: error: list is corrupted\n");
+ pr_err("error: list is corrupted\n");
goto exit;
}
if (count != TEST_LIST_LEN) {
- printk(KERN_ERR "list_sort_test: error: bad list length %d",
- count);
+ pr_err("error: bad list length %d", count);
goto exit;
}
_
--
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