linux-kernel - Re: [patch] ioremap sanity check to catch mapping requests exceeding the BAR sizes

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Message-ID: <20080926081226.GA8556@elte.hu>
Date:	Fri, 26 Sep 2008 10:12:26 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	jbarnes@...tuousgeek.org, tglx@...utronix.de, hpa@...or.com,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	arjan@...ux.intel.com, linux-kernel@...r.kernel.org,
	Yinghai Lu <yhlu.kernel@...il.com>
Subject: Re: [patch] ioremap sanity check to catch mapping requests
	exceeding the BAR sizes


* Ingo Molnar <mingo@...e.hu> wrote:

> > +		printk(KERN_WARNING "resource map sanity check conflict "
> > +		       " 0x%llx 0x%llx 0x%llx 0x%llx %s\n",
> > +		       addr, addr + size - 1, p->start, p->end, p->name);

needed two build fixes (and the printk type checking annoyances keep 
littering the tree):

>From 13eb83754b40bf01dc84e52a08d4196d1b719a0e Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@...e.hu>
Date: Fri, 26 Sep 2008 10:10:12 +0200
Subject: [PATCH] IO resources, x86: ioremap sanity check to catch mapping requests exceeding, fix

fix this build error:

 kernel/resource.c: In function 'iomem_map_sanity_check':
 kernel/resource.c:842: error: implicit declaration of function 'r_next'
 kernel/resource.c:842: warning: assignment makes pointer from integer without a cast

r_next() was only available if CONFIG_PROCFS was enabled.

and fix this build warning:

 kernel/resource.c:855: warning: format '%llx' expects type 'long long unsigned int', but argument 2 has type 'resource_size_t'
 kernel/resource.c:855: warning: format '%llx' expects type 'long long unsigned int', but argument 3 has type 'long unsigned int'
 kernel/resource.c:855: warning: format '%llx' expects type 'long long unsigned int', but argument 4 has type 'resource_size_t'
 kernel/resource.c:855: warning: format '%llx' expects type 'long long unsigned int', but argument 5 has type 'resource_size_t'

resource_t can be 32 bits.

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/resource.c |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/kernel/resource.c b/kernel/resource.c
index 1d003a5..7797dae 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -38,10 +38,6 @@ EXPORT_SYMBOL(iomem_resource);
 
 static DEFINE_RWLOCK(resource_lock);
 
-#ifdef CONFIG_PROC_FS
-
-enum { MAX_IORES_LEVEL = 5 };
-
 static void *r_next(struct seq_file *m, void *v, loff_t *pos)
 {
 	struct resource *p = v;
@@ -53,6 +49,10 @@ static void *r_next(struct seq_file *m, void *v, loff_t *pos)
 	return p->sibling;
 }
 
+#ifdef CONFIG_PROC_FS
+
+enum { MAX_IORES_LEVEL = 5 };
+
 static void *r_start(struct seq_file *m, loff_t *pos)
 	__acquires(resource_lock)
 {
@@ -852,7 +852,11 @@ int iomem_map_sanity_check(resource_size_t addr, unsigned long size)
 			continue;
 		printk(KERN_WARNING "resource map sanity check conflict: "
 		       "0x%llx 0x%llx 0x%llx 0x%llx %s\n",
-		       addr, addr + size - 1, p->start, p->end, p->name);
+		       (unsigned long long)addr,
+		       (unsigned long long)(addr + size - 1),
+		       (unsigned long long)p->start,
+		       (unsigned long long)p->end,
+		       p->name);
 		err = -1;
 		break;
 	}
--
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