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Subject[patch 11/17] Use WARN() in arch/x86/kernel
From: Arjan van de Ven <arjan@linux.intel.com>
Subject: Use WARN instead of printk+WARN_ON in arch/x86/kernel

Use WARN() instead of a printk+WARN_ON() pair; this way the message
becomes part of the warning section for better reporting/collection.
This also allowed the folding of some if()'s into the WARN()

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>

---
arch/x86/kernel/cpu/mtrr/main.c | 5 +----
arch/x86/kernel/pci-calgary_64.c | 3 +--
arch/x86/kernel/tsc_sync.c | 6 ++----
3 files changed, 4 insertions(+), 10 deletions(-)

Index: linux.trees.git/arch/x86/kernel/pci-calgary_64.c
===================================================================
--- linux.trees.git.orig/arch/x86/kernel/pci-calgary_64.c
+++ linux.trees.git/arch/x86/kernel/pci-calgary_64.c
@@ -339,9 +339,8 @@ static void iommu_free(struct iommu_tabl
/* were we called with bad_dma_address? */
badend = bad_dma_address + (EMERGENCY_PAGES * PAGE_SIZE);
if (unlikely((dma_addr >= bad_dma_address) && (dma_addr < badend))) {
- printk(KERN_ERR "Calgary: driver tried unmapping bad DMA "
+ WARN(1, KERN_ERR "Calgary: driver tried unmapping bad DMA "
"address 0x%Lx\n", dma_addr);
- WARN_ON(1);
return;
}

Index: linux.trees.git/arch/x86/kernel/tsc_sync.c
===================================================================
--- linux.trees.git.orig/arch/x86/kernel/tsc_sync.c
+++ linux.trees.git/arch/x86/kernel/tsc_sync.c
@@ -88,11 +88,9 @@ static __cpuinit void check_tsc_warp(voi
__raw_spin_unlock(&sync_lock);
}
}
- if (!(now-start)) {
- printk("Warning: zero tsc calibration delta: %Ld [max: %Ld]\n",
+ WARN(!(now-start),
+ "Warning: zero tsc calibration delta: %Ld [max: %Ld]\n",
now-start, end-start);
- WARN_ON(1);
- }
}

/*
Index: linux.trees.git/arch/x86/kernel/cpu/mtrr/main.c
===================================================================
--- linux.trees.git.orig/arch/x86/kernel/cpu/mtrr/main.c
+++ linux.trees.git/arch/x86/kernel/cpu/mtrr/main.c
@@ -1496,11 +1496,8 @@ int __init mtrr_trim_uncached_memory(uns

/* kvm/qemu doesn't have mtrr set right, don't trim them all */
if (!highest_pfn) {
- if (!kvm_para_available()) {
- printk(KERN_WARNING
+ WARN(!kvm_para_available(), KERN_WARNING
"WARNING: strange, CPU MTRRs all blank?\n");
- WARN_ON(1);
- }
return 0;
}


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