linux-kernel - [PATCH] x86 mmiotrace: page level is unsigned

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Date:	Thu, 1 May 2008 18:38:12 +0300
From:	Pekka Paalanen <pq@....fi>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Pavel Roskin <proski@....org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] x86 mmiotrace: page level is unsigned

>From 8261c3eeead01739d18875797816637621d17c2d Mon Sep 17 00:00:00 2001
From: Pekka Paalanen <pq@....fi>
Date: Thu, 1 May 2008 16:15:11 +0300
Subject: [PATCH] x86 mmiotrace: page level is unsigned

Fixes some sparse warnings.

Signed-off-by: Pekka Paalanen <pq@....fi>
---

There are three other sparse warnings, too, but two are false
positives and one is a code style issue. I do not know how to annotate
those away, or if it is even possible, so I will probably write a
proper question some time after the merge window closes about how to
deal with those.

 arch/x86/mm/kmmio.c    |   13 +++++++------
 arch/x86/mm/mmio-mod.c |    2 +-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index c12be07..93d8203 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -105,11 +105,12 @@ static struct kmmio_fault_page *get_kmmio_fault_page(unsigned long page)
 	return NULL;
 }
 
-static void set_page_present(unsigned long addr, bool present, int *pglevel)
+static void set_page_present(unsigned long addr, bool present,
+							unsigned int *pglevel)
 {
 	pteval_t pteval;
 	pmdval_t pmdval;
-	int level;
+	unsigned int level;
 	pmd_t *pmd;
 	pte_t *pte = lookup_address(addr, &level);
 
@@ -146,15 +147,15 @@ static void set_page_present(unsigned long addr, bool present, int *pglevel)
 }
 
 /** Mark the given page as not present. Access to it will trigger a fault. */
-static void arm_kmmio_fault_page(unsigned long page, int *page_level)
+static void arm_kmmio_fault_page(unsigned long page, unsigned int *pglevel)
 {
-	set_page_present(page & PAGE_MASK, false, page_level);
+	set_page_present(page & PAGE_MASK, false, pglevel);
 }
 
 /** Mark the given page as present. */
-static void disarm_kmmio_fault_page(unsigned long page, int *page_level)
+static void disarm_kmmio_fault_page(unsigned long page, unsigned int *pglevel)
 {
-	set_page_present(page & PAGE_MASK, true, page_level);
+	set_page_present(page & PAGE_MASK, true, pglevel);
 }
 
 /*
diff --git a/arch/x86/mm/mmio-mod.c b/arch/x86/mm/mmio-mod.c
index ed0e0e9..e7397e1 100644
--- a/arch/x86/mm/mmio-mod.c
+++ b/arch/x86/mm/mmio-mod.c
@@ -137,7 +137,7 @@ static ssize_t write_marker(struct file *file, const char __user *buffer,
 
 static void print_pte(unsigned long address)
 {
-	int level;
+	unsigned int level;
 	pte_t *pte = lookup_address(address, &level);
 
 	if (!pte) {
-- 
1.5.3.7

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