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authorLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 15:17:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 15:17:40 -0700
commite533b227055598b1f7dc8503a3b4f36b14b9da8a (patch)
tree28fec4125eac45c8e2fac75b3d10ff5cd987d2f6 /kernel/resource.c
parent0999d978dcdcf59350dafa25afd70def9f924eee (diff)
parent6b2ada82101a08e2830fb29d7dc9b858be637dd4 (diff)
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Merge branch 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: do_generic_file_read: s/EINTR/EIO/ if lock_page_killable() fails softirq, warning fix: correct a format to avoid a warning softirqs, debug: preemption check x86, pci-hotplug, calgary / rio: fix EBDA ioremap() IO resources, x86: ioremap sanity check to catch mapping requests exceeding, fix IO resources, x86: ioremap sanity check to catch mapping requests exceeding the BAR sizes softlockup: Documentation/sysctl/kernel.txt: fix softlockup_thresh description dmi scan: warn about too early calls to dmi_check_system() generic: redefine resource_size_t as phys_addr_t generic: make PFN_PHYS explicitly return phys_addr_t generic: add phys_addr_t for holding physical addresses softirq: allocate less vectors IO resources: fix/remove printk printk: robustify printk, update comment printk: robustify printk, fix #2 printk: robustify printk, fix printk: robustify printk Fixed up conflicts in: arch/powerpc/include/asm/types.h arch/powerpc/platforms/Kconfig.cputype manually.
Diffstat (limited to 'kernel/resource.c')
-rw-r--r--kernel/resource.c51
1 files changed, 42 insertions, 9 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index f193d6e3ded2..4089d12af6e0 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)
{
@@ -549,13 +549,9 @@ static void __init __reserve_region_with_split(struct resource *root,
}
if (!res) {
- printk(KERN_DEBUG " __reserve_region_with_split: (%s) [%llx, %llx], res: (%s) [%llx, %llx]\n",
- conflict->name, conflict->start, conflict->end,
- name, start, end);
-
/* failed, split and try again */
- /* conflict coverred whole area */
+ /* conflict covered whole area */
if (conflict->start <= start && conflict->end >= end)
return;
@@ -832,3 +828,40 @@ static int __init reserve_setup(char *str)
}
__setup("reserve=", reserve_setup);
+
+/*
+ * Check if the requested addr and size spans more than any slot in the
+ * iomem resource tree.
+ */
+int iomem_map_sanity_check(resource_size_t addr, unsigned long size)
+{
+ struct resource *p = &iomem_resource;
+ int err = 0;
+ loff_t l;
+
+ read_lock(&resource_lock);
+ for (p = p->child; p ; p = r_next(NULL, p, &l)) {
+ /*
+ * We can probably skip the resources without
+ * IORESOURCE_IO attribute?
+ */
+ if (p->start >= addr + size)
+ continue;
+ if (p->end < addr)
+ continue;
+ if (p->start <= addr && (p->end >= addr + size - 1))
+ continue;
+ printk(KERN_WARNING "resource map sanity check conflict: "
+ "0x%llx 0x%llx 0x%llx 0x%llx %s\n",
+ (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;
+ }
+ read_unlock(&resource_lock);
+
+ return err;
+}