[PATCH] x86_64: {set,clear,test}_bit() related cleanup and pci_mmcfg_init() fix

While working on these patch set, I found several possible cleanup on x86-64
and ia64.

akpm: I stole this from Andi's queue.

Not only does it clean up bitops.  It also unrelatedly changes the prototype
of pci_mmcfg_init() and removes its arch_initcall().  It seems that the wrong
two patches got joined together, but this is the one which has been tested.

This patch fixes the current x86_64 build error (the pci_mmcfg_init()
declaration in arch/i386/pci/pci.h disagrees with the definition in
arch/x86_64/pci/mmconfig.c)

This also means that x86_64's pci_mmcfg_init() gets called in the same (new)
manner as x86's: from arch/i386/pci/init.c:pci_access_init(), rather than via
initcall.

The bitops cleanups came along for free.

All this worked OK in -mm testing (since 2.6.16-rc4-mm1) because x86_64 was
tested with both patches applied.

Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Con Kolivas <kernel@kolivas.org>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 9 insertions, 15 deletions

diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c
index b8b9529fa89..04282ef9fbd 100644
--- a/arch/x86_64/kernel/mce.c
+++ b/arch/x86_64/kernel/mce.c
@@ -139,8 +139,7 @@ static void mce_panic(char *msg, struct mce *backup, unsigned long start)
 
 static int mce_available(struct cpuinfo_x86 *c)
 {
-	return test_bit(X86_FEATURE_MCE, &c->x86_capability) &&
-	       test_bit(X86_FEATURE_MCA, &c->x86_capability);
+	return cpu_has(c, X86_FEATURE_MCE) && cpu_has(c, X86_FEATURE_MCA);
 }
 
 static inline void mce_get_rip(struct mce *m, struct pt_regs *regs)
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index aa55e3cec66..f227d0c23dc 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -1344,8 +1344,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	{ 
 		int i; 
 		for ( i = 0 ; i < 32*NCAPINTS ; i++ )
-			if ( test_bit(i, &c->x86_capability) &&
-			     x86_cap_flags[i] != NULL )
+			if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
 				seq_printf(m, " %s", x86_cap_flags[i]);
 	}
 		
diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c
index 18f371fe37f..e616500207e 100644
--- a/arch/x86_64/pci/mmconfig.c
+++ b/arch/x86_64/pci/mmconfig.c
@@ -55,7 +55,7 @@ static char __iomem *get_virt(unsigned int seg, unsigned bus)
 static char __iomem *pci_dev_base(unsigned int seg, unsigned int bus, unsigned int devfn)
 {
 	char __iomem *addr;
-	if (seg == 0 && bus == 0 && test_bit(PCI_SLOT(devfn), &fallback_slots))
+	if (seg == 0 && bus == 0 && test_bit(PCI_SLOT(devfn), fallback_slots))
 		return NULL;
 	addr = get_virt(seg, bus);
 	if (!addr)
@@ -143,29 +143,29 @@ static __init void unreachable_devices(void)
 			continue;
 		addr = pci_dev_base(0, 0, PCI_DEVFN(i, 0));
 		if (addr == NULL|| readl(addr) != val1) {
-			set_bit(i, &fallback_slots);
+			set_bit(i, fallback_slots);
 		}
 	}
 }
 
-static int __init pci_mmcfg_init(void)
+void __init pci_mmcfg_init(void)
 {
 	int i;
 
 	if ((pci_probe & PCI_PROBE_MMCONF) == 0)
-		return 0;
+		return;
 
 	acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
 	if ((pci_mmcfg_config_num == 0) ||
 	    (pci_mmcfg_config == NULL) ||
 	    (pci_mmcfg_config[0].base_address == 0))
-		return 0;
+		return;
 
 	/* RED-PEN i386 doesn't do _nocache right now */
 	pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) * pci_mmcfg_config_num, GFP_KERNEL);
 	if (pci_mmcfg_virt == NULL) {
 		printk("PCI: Can not allocate memory for mmconfig structures\n");
-		return 0;
+		return;
 	}
 	for (i = 0; i < pci_mmcfg_config_num; ++i) {
 		pci_mmcfg_virt[i].cfg = &pci_mmcfg_config[i];
@@ -173,7 +173,7 @@ static int __init pci_mmcfg_init(void)
 		if (!pci_mmcfg_virt[i].virt) {
 			printk("PCI: Cannot map mmconfig aperture for segment %d\n",
 			       pci_mmcfg_config[i].pci_segment_group_number);
-			return 0;
+			return;
 		}
 		printk(KERN_INFO "PCI: Using MMCONFIG at %x\n", pci_mmcfg_config[i].base_address);
 	}
@@ -182,8 +182,4 @@ static int __init pci_mmcfg_init(void)
 
 	raw_pci_ops = &pci_mmcfg;
 	pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
-
-	return 0;
 }
-
-arch_initcall(pci_mmcfg_init);