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| author | Ingo Molnar | 2008-01-30 13:33:45 +0100 |
|---|---|---|
| committer | Ingo Molnar | 2008-01-30 13:33:45 +0100 |
| commit | bd796ed0232a036f5ab14ac68d0a05f791ebcc3b (patch) | |
| tree | 61ad5d8effd73c1b0242f3e08863184abc4e84ee /arch/x86/mm/ioremap_32.c | |
| parent | x86: increase the number of boot-mappings (diff) | |
| download | kernel-qcow2-linux-bd796ed0232a036f5ab14ac68d0a05f791ebcc3b.tar.gz kernel-qcow2-linux-bd796ed0232a036f5ab14ac68d0a05f791ebcc3b.tar.xz kernel-qcow2-linux-bd796ed0232a036f5ab14ac68d0a05f791ebcc3b.zip | |
x86: add debug warnings to early_ioremap()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm/ioremap_32.c')
| -rw-r--r-- | arch/x86/mm/ioremap_32.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/arch/x86/mm/ioremap_32.c b/arch/x86/mm/ioremap_32.c index 63f76ecae44c..4bcd5e065df4 100644 --- a/arch/x86/mm/ioremap_32.c +++ b/arch/x86/mm/ioremap_32.c @@ -306,12 +306,15 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size) /* Don't allow wraparound or zero size */ last_addr = phys_addr + size - 1; - if (!size || last_addr < phys_addr) + if (!size || last_addr < phys_addr) { + WARN_ON(1); return NULL; + } - if (nesting >= FIX_BTMAPS_NESTING) + if (nesting >= FIX_BTMAPS_NESTING) { + WARN_ON(1); return NULL; - + } early_ioremap_nested++; /* * Mappings have to be page-aligned @@ -324,8 +327,10 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size) * Mappings have to fit in the FIX_BTMAP area. */ nrpages = size >> PAGE_SHIFT; - if (nrpages > NR_FIX_BTMAPS) + if (nrpages > NR_FIX_BTMAPS) { + WARN_ON(1); return NULL; + } /* * Ok, go for it.. @@ -351,11 +356,13 @@ void __init early_iounmap(void *addr, unsigned long size) unsigned int nesting; nesting = --early_ioremap_nested; + WARN_ON(nesting < 0); virt_addr = (unsigned long)addr; - if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN)) + if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN)) { + WARN_ON(1); return; - + } offset = virt_addr & ~PAGE_MASK; nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT; |