x86: clean up include/asm-x86/processor.h

basic style cleanup to flush out years of neglect:

 - consistent indentation
 - whitespace fixes
 - consistent comments

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 358 insertions, 280 deletions

diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h
index 45a2f0ab33d0..43d2cc829a94 100644
--- a/include/asm-x86/processor.h
+++ b/include/asm-x86/processor.h
@@ -24,6 +24,7 @@ struct mm_struct;
 #include <asm/msr.h>
 #include <asm/desc_defs.h>
 #include <asm/nops.h>
+
 #include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <linux/cache.h>
@@ -37,16 +38,18 @@ struct mm_struct;
 static inline void *current_text_addr(void)
 {
 	void *pc;
-	asm volatile("mov $1f,%0\n1:":"=r" (pc));
+
+	asm volatile("mov $1f, %0; 1:":"=r" (pc));
+
 	return pc;
 }
 
 #ifdef CONFIG_X86_VSMP
-#define ARCH_MIN_TASKALIGN	(1 << INTERNODE_CACHE_SHIFT)
-#define ARCH_MIN_MMSTRUCT_ALIGN	(1 << INTERNODE_CACHE_SHIFT)
+# define ARCH_MIN_TASKALIGN		(1 << INTERNODE_CACHE_SHIFT)
+# define ARCH_MIN_MMSTRUCT_ALIGN	(1 << INTERNODE_CACHE_SHIFT)
 #else
-#define ARCH_MIN_TASKALIGN	16
-#define ARCH_MIN_MMSTRUCT_ALIGN	0
+# define ARCH_MIN_TASKALIGN		16
+# define ARCH_MIN_MMSTRUCT_ALIGN	0
 #endif
 
 /*
@@ -56,69 +59,81 @@ static inline void *current_text_addr(void)
  */
 
 struct cpuinfo_x86 {
-	__u8	x86;		/* CPU family */
-	__u8	x86_vendor;	/* CPU vendor */
-	__u8	x86_model;
-	__u8	x86_mask;
+	__u8			x86;		/* CPU family */
+	__u8			x86_vendor;	/* CPU vendor */
+	__u8			x86_model;
+	__u8			x86_mask;
 #ifdef CONFIG_X86_32
-	char	wp_works_ok;	/* It doesn't on 386's */
-	char	hlt_works_ok;	/* Problems on some 486Dx4's and old 386's */
-	char	hard_math;
-	char	rfu;
-	char	fdiv_bug;
-	char	f00f_bug;
-	char	coma_bug;
-	char	pad0;
+	char			wp_works_ok;	/* It doesn't on 386's */
+
+	/* Problems on some 486Dx4's and old 386's: */
+	char			hlt_works_ok;
+	char			hard_math;
+	char			rfu;
+	char			fdiv_bug;
+	char			f00f_bug;
+	char			coma_bug;
+	char			pad0;
 #else
-	/* number of 4K pages in DTLB/ITLB combined(in pages)*/
-	int     x86_tlbsize;
-	__u8    x86_virt_bits, x86_phys_bits;
-	/* cpuid returned core id bits */
-	__u8    x86_coreid_bits;
-	/* Max extended CPUID function supported */
-	__u32   extended_cpuid_level;
+	/* Number of 4K pages in DTLB/ITLB combined(in pages): */
+	int			 x86_tlbsize;
+	__u8			x86_virt_bits;
+	__u8			x86_phys_bits;
+	/* CPUID returned core id bits: */
+	__u8			x86_coreid_bits;
+	/* Max extended CPUID function supported: */
+	__u32			extended_cpuid_level;
 #endif
-	int	cpuid_level;	/* Maximum supported CPUID level, -1=no CPUID */
-	__u32	x86_capability[NCAPINTS];
-	char	x86_vendor_id[16];
-	char	x86_model_id[64];
-	int 	x86_cache_size;  /* in KB - valid for CPUS which support this
-				    call  */
-	int 	x86_cache_alignment;	/* In bytes */
-	int	x86_power;
-	unsigned long loops_per_jiffy;
+	/* Maximum supported CPUID level, -1=no CPUID: */
+	int			cpuid_level;
+	__u32			x86_capability[NCAPINTS];
+	char			x86_vendor_id[16];
+	char			x86_model_id[64];
+	/* in KB - valid for CPUS which support this call: */
+	int			x86_cache_size;
+	int			x86_cache_alignment;	/* In bytes */
+	int			x86_power;
+	unsigned long		loops_per_jiffy;
 #ifdef CONFIG_SMP
-	cpumask_t llc_shared_map;	/* cpus sharing the last level cache */
+	/* cpus sharing the last level cache: */
+	cpumask_t		llc_shared_map;
 #endif
-	u16 x86_max_cores;		/* cpuid returned max cores value */
-	u16 apicid;
-	u16 x86_clflush_size;
+	/* cpuid returned max cores value: */
+	u16			 x86_max_cores;
+	u16			apicid;
+	u16			x86_clflush_size;
 #ifdef CONFIG_SMP
-	u16 booted_cores;		/* number of cores as seen by OS */
-	u16 phys_proc_id; 		/* Physical processor id. */
-	u16 cpu_core_id;  		/* Core id */
-	u16 cpu_index;			/* index into per_cpu list */
+	/* number of cores as seen by the OS: */
+	u16			booted_cores;
+	/* Physical processor id: */
+	u16			phys_proc_id;
+	/* Core id: */
+	u16			cpu_core_id;
+	/* Index into per_cpu list: */
+	u16			cpu_index;
 #endif
 } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 
-#define X86_VENDOR_INTEL 0
-#define X86_VENDOR_CYRIX 1
-#define X86_VENDOR_AMD 2
-#define X86_VENDOR_UMC 3
-#define X86_VENDOR_NEXGEN 4
-#define X86_VENDOR_CENTAUR 5
-#define X86_VENDOR_TRANSMETA 7
-#define X86_VENDOR_NSC 8
-#define X86_VENDOR_NUM 9
-#define X86_VENDOR_UNKNOWN 0xff
+#define X86_VENDOR_INTEL	0
+#define X86_VENDOR_CYRIX	1
+#define X86_VENDOR_AMD		2
+#define X86_VENDOR_UMC		3
+#define X86_VENDOR_NEXGEN	4
+#define X86_VENDOR_CENTAUR	5
+#define X86_VENDOR_TRANSMETA	7
+#define X86_VENDOR_NSC		8
+#define X86_VENDOR_NUM		9
+
+#define X86_VENDOR_UNKNOWN	0xff
 
 /*
  * capabilities of CPUs
  */
-extern struct cpuinfo_x86 boot_cpu_data;
-extern struct cpuinfo_x86 new_cpu_data;
-extern struct tss_struct doublefault_tss;
-extern __u32 cleared_cpu_caps[NCAPINTS];
+extern struct cpuinfo_x86	boot_cpu_data;
+extern struct cpuinfo_x86	new_cpu_data;
+
+extern struct tss_struct	doublefault_tss;
+extern __u32			cleared_cpu_caps[NCAPINTS];
 
 #ifdef CONFIG_SMP
 DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
@@ -129,7 +144,9 @@ DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
 #define current_cpu_data	boot_cpu_data
 #endif
 
-void cpu_detect(struct cpuinfo_x86 *c);
+#define cache_line_size()	(boot_cpu_data.x86_cache_alignment)
+
+extern void cpu_detect(struct cpuinfo_x86 *c);
 
 extern void identify_cpu(struct cpuinfo_x86 *);
 extern void identify_boot_cpu(void);
@@ -146,7 +163,7 @@ static inline void detect_ht(struct cpuinfo_x86 *c) {}
 #endif
 
 static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
-					 unsigned int *ecx, unsigned int *edx)
+				unsigned int *ecx, unsigned int *edx)
 {
 	/* ecx is often an input as well as an output. */
 	__asm__("cpuid"
@@ -165,54 +182,67 @@ static inline void load_cr3(pgd_t *pgdir)
 #ifdef CONFIG_X86_32
 /* This is the TSS defined by the hardware. */
 struct x86_hw_tss {
-	unsigned short	back_link, __blh;
-	unsigned long	sp0;
-	unsigned short	ss0, __ss0h;
-	unsigned long	sp1;
-	unsigned short	ss1, __ss1h;	/* ss1 caches MSR_IA32_SYSENTER_CS */
-	unsigned long	sp2;
-	unsigned short	ss2, __ss2h;
-	unsigned long	__cr3;
-	unsigned long	ip;
-	unsigned long	flags;
-	unsigned long	ax, cx, dx, bx;
-	unsigned long	sp, bp, si, di;
-	unsigned short	es, __esh;
-	unsigned short	cs, __csh;
-	unsigned short	ss, __ssh;
-	unsigned short	ds, __dsh;
-	unsigned short	fs, __fsh;
-	unsigned short	gs, __gsh;
-	unsigned short	ldt, __ldth;
-	unsigned short	trace, io_bitmap_base;
+	unsigned short		back_link, __blh;
+	unsigned long		sp0;
+	unsigned short		ss0, __ss0h;
+	unsigned long		sp1;
+	/* ss1 caches MSR_IA32_SYSENTER_CS: */
+	unsigned short		ss1, __ss1h;
+	unsigned long		sp2;
+	unsigned short		ss2, __ss2h;
+	unsigned long		__cr3;
+	unsigned long		ip;
+	unsigned long		flags;
+	unsigned long		ax;
+	unsigned long		cx;
+	unsigned long		dx;
+	unsigned long		bx;
+	unsigned long		sp;
+	unsigned long		bp;
+	unsigned long		si;
+	unsigned long		di;
+	unsigned short		es, __esh;
+	unsigned short		cs, __csh;
+	unsigned short		ss, __ssh;
+	unsigned short		ds, __dsh;
+	unsigned short		fs, __fsh;
+	unsigned short		gs, __gsh;
+	unsigned short		ldt, __ldth;
+	unsigned short		trace;
+	unsigned short		io_bitmap_base;
+
 } __attribute__((packed));
 #else
 struct x86_hw_tss {
-	u32 reserved1;
-	u64 sp0;
-	u64 sp1;
-	u64 sp2;
-	u64 reserved2;
-	u64 ist[7];
-	u32 reserved3;
-	u32 reserved4;
-	u16 reserved5;
-	u16 io_bitmap_base;
+	u32			reserved1;
+	u64			sp0;
+	u64			sp1;
+	u64			sp2;
+	u64			reserved2;
+	u64			ist[7];
+	u32			reserved3;
+	u32			reserved4;
+	u16			reserved5;
+	u16			io_bitmap_base;
+
 } __attribute__((packed)) ____cacheline_aligned;
 #endif
 
 /*
- * Size of io_bitmap.
+ * IO-bitmap sizes:
  */
-#define IO_BITMAP_BITS  65536
-#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
-#define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long))
-#define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap)
-#define INVALID_IO_BITMAP_OFFSET 0x8000
-#define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000
+#define IO_BITMAP_BITS			65536
+#define IO_BITMAP_BYTES			(IO_BITMAP_BITS/8)
+#define IO_BITMAP_LONGS			(IO_BITMAP_BYTES/sizeof(long))
+#define IO_BITMAP_OFFSET		offsetof(struct tss_struct, io_bitmap)
+#define INVALID_IO_BITMAP_OFFSET	0x8000
+#define INVALID_IO_BITMAP_OFFSET_LAZY	0x9000
 
 struct tss_struct {
-	struct x86_hw_tss x86_tss;
+	/*
+	 * The hardware state:
+	 */
+	struct x86_hw_tss	x86_tss;
 
 	/*
 	 * The extra 1 is there because the CPU will access an
@@ -220,48 +250,54 @@ struct tss_struct {
 	 * bitmap. The extra byte must be all 1 bits, and must
 	 * be within the limit.
 	 */
-	unsigned long	io_bitmap[IO_BITMAP_LONGS + 1];
+	unsigned long		io_bitmap[IO_BITMAP_LONGS + 1];
 	/*
 	 * Cache the current maximum and the last task that used the bitmap:
 	 */
-	unsigned long io_bitmap_max;
-	struct thread_struct *io_bitmap_owner;
+	unsigned long		io_bitmap_max;
+	struct thread_struct	*io_bitmap_owner;
+
 	/*
-	 * pads the TSS to be cacheline-aligned (size is 0x100)
+	 * Pad the TSS to be cacheline-aligned (size is 0x100):
 	 */
-	unsigned long __cacheline_filler[35];
+	unsigned long		__cacheline_filler[35];
 	/*
-	 * .. and then another 0x100 bytes for emergency kernel stack
+	 * .. and then another 0x100 bytes for the emergency kernel stack:
 	 */
-	unsigned long stack[64];
+	unsigned long		stack[64];
+
 } __attribute__((packed));
 
 DECLARE_PER_CPU(struct tss_struct, init_tss);
 
-/* Save the original ist values for checking stack pointers during debugging */
+/*
+ * Save the original ist values for checking stack pointers during debugging
+ */
 struct orig_ist {
-	unsigned long ist[7];
+	unsigned long		ist[7];
 };
 
 #define	MXCSR_DEFAULT		0x1f80
 
 struct i387_fsave_struct {
-	u32	cwd;
-	u32	swd;
-	u32	twd;
-	u32	fip;
-	u32	fcs;
-	u32	foo;
-	u32	fos;
-	u32	st_space[20];	/* 8*10 bytes for each FP-reg = 80 bytes */
-	u32	status;		/* software status information */
+	u32			cwd;
+	u32			swd;
+	u32			twd;
+	u32			fip;
+	u32			fcs;
+	u32			foo;
+	u32			fos;
+	/* 8*10 bytes for each FP-reg = 80 bytes: */
+	u32			st_space[20];
+	/* Software status information: */
+	u32			status;
 };
 
 struct i387_fxsave_struct {
-	u16	cwd;
-	u16	swd;
-	u16	twd;
-	u16	fop;
+	u16			cwd;
+	u16			swd;
+	u16			twd;
+	u16			fop;
 	union {
 		struct {
 			u64	rip;
@@ -274,31 +310,40 @@ struct i387_fxsave_struct {
 			u32	fos;
 		};
 	};
-	u32	mxcsr;
-	u32	mxcsr_mask;
-	u32	st_space[32];	/* 8*16 bytes for each FP-reg = 128 bytes */
-	u32	xmm_space[64];	/* 16*16 bytes for each XMM-reg = 256 bytes */
-	u32	padding[24];
+	u32			mxcsr;
+	u32			mxcsr_mask;
+	/* 8*16 bytes for each FP-reg = 128 bytes: */
+	u32			st_space[32];
+	/* 16*16 bytes for each XMM-reg = 256 bytes: */
+	u32			xmm_space[64];
+	u32			padding[24];
+
 } __attribute__((aligned(16)));
 
 struct i387_soft_struct {
-	u32	cwd;
-	u32	swd;
-	u32	twd;
-	u32	fip;
-	u32	fcs;
-	u32	foo;
-	u32	fos;
-	u32	st_space[20];	/* 8*10 bytes for each FP-reg = 80 bytes */
-	u8	ftop, changed, lookahead, no_update, rm, alimit;
-	struct info	*info;
-	u32	entry_eip;
+	u32			cwd;
+	u32			swd;
+	u32			twd;
+	u32			fip;
+	u32			fcs;
+	u32			foo;
+	u32			fos;
+	/* 8*10 bytes for each FP-reg = 80 bytes: */
+	u32			st_space[20];
+	u8			ftop;
+	u8			changed;
+	u8			lookahead;
+	u8			no_update;
+	u8			rm;
+	u8			alimit;
+	struct info		*info;
+	u32			entry_eip;
 };
 
 union i387_union {
 	struct i387_fsave_struct	fsave;
 	struct i387_fxsave_struct	fxsave;
-	struct i387_soft_struct 	soft;
+	struct i387_soft_struct		soft;
 };
 
 #ifdef CONFIG_X86_32
@@ -313,42 +358,50 @@ extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
 extern unsigned short num_cache_leaves;
 
 struct thread_struct {
-/* cached TLS descriptors. */
-	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
-	unsigned long	sp0;
-	unsigned long	sp;
+	/* Cached TLS descriptors: */
+	struct desc_struct	tls_array[GDT_ENTRY_TLS_ENTRIES];
+	unsigned long		sp0;
+	unsigned long		sp;
 #ifdef CONFIG_X86_32
-	unsigned long	sysenter_cs;
+	unsigned long		sysenter_cs;
 #else
-	unsigned long 	usersp;	/* Copy from PDA */
-	unsigned short	es, ds, fsindex, gsindex;
+	unsigned long		usersp;	/* Copy from PDA */
+	unsigned short		es;
+	unsigned short		ds;
+	unsigned short		fsindex;
+	unsigned short		gsindex;
 #endif
-	unsigned long	ip;
-	unsigned long	fs;
-	unsigned long	gs;
-/* Hardware debugging registers */
-	unsigned long	debugreg0;
-	unsigned long	debugreg1;
-	unsigned long	debugreg2;
-	unsigned long	debugreg3;
-	unsigned long	debugreg6;
-	unsigned long	debugreg7;
-/* fault info */
-	unsigned long	cr2, trap_no, error_code;
-/* floating point info */
+	unsigned long		ip;
+	unsigned long		fs;
+	unsigned long		gs;
+	/* Hardware debugging registers: */
+	unsigned long		debugreg0;
+	unsigned long		debugreg1;
+	unsigned long		debugreg2;
+	unsigned long		debugreg3;
+	unsigned long		debugreg6;
+	unsigned long		debugreg7;
+	/* Fault info: */
+	unsigned long		cr2;
+	unsigned long		trap_no;
+	unsigned long		error_code;
+	/* Floating point info: */
 	union i387_union	i387 __attribute__((aligned(16)));;
 #ifdef CONFIG_X86_32
-/* virtual 86 mode info */
+	/* Virtual 86 mode info */
 	struct vm86_struct __user *vm86_info;
 	unsigned long		screen_bitmap;
-	unsigned long		v86flags, v86mask, saved_sp0;
-	unsigned int		saved_fs, saved_gs;
+	unsigned long		v86flags;
+	unsigned long		v86mask;
+	unsigned long		saved_sp0;
+	unsigned int		saved_fs;
+	unsigned int		saved_gs;
 #endif
-/* IO permissions */
-	unsigned long	*io_bitmap_ptr;
-	unsigned long	iopl;
-/* max allowed port in the bitmap, in bytes: */
-	unsigned io_bitmap_max;
+	/* IO permissions: */
+	unsigned long		*io_bitmap_ptr;
+	unsigned long		iopl;
+	/* Max allowed port in the bitmap, in bytes: */
+	unsigned		io_bitmap_max;
 /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set.  */
 	unsigned long	debugctlmsr;
 /* Debug Store - if not 0 points to a DS Save Area configuration;
@@ -358,7 +411,7 @@ struct thread_struct {
 
 static inline unsigned long native_get_debugreg(int regno)
 {
-	unsigned long val = 0; 	/* Damn you, gcc! */
+	unsigned long val = 0;	/* Damn you, gcc! */
 
 	switch (regno) {
 	case 0:
@@ -383,22 +436,22 @@ static inline void native_set_debugreg(int regno, unsigned long value)
 {
 	switch (regno) {
 	case 0:
-		asm("mov %0,%%db0"	: /* no output */ :"r" (value));
+		asm("mov %0, %%db0"	::"r" (value));
 		break;
 	case 1:
-		asm("mov %0,%%db1"	: /* no output */ :"r" (value));
+		asm("mov %0, %%db1"	::"r" (value));
 		break;
 	case 2:
-		asm("mov %0,%%db2"	: /* no output */ :"r" (value));
+		asm("mov %0, %%db2"	::"r" (value));
 		break;
 	case 3:
-		asm("mov %0,%%db3"	: /* no output */ :"r" (value));
+		asm("mov %0, %%db3"	::"r" (value));
 		break;
 	case 6:
-		asm("mov %0,%%db6"	: /* no output */ :"r" (value));
+		asm("mov %0, %%db6"	::"r" (value));
 		break;
 	case 7:
-		asm("mov %0,%%db7"	: /* no output */ :"r" (value));
+		asm("mov %0, %%db7"	::"r" (value));
 		break;
 	default:
 		BUG();
@@ -412,6 +465,7 @@ static inline void native_set_iopl_mask(unsigned mask)
 {
 #ifdef CONFIG_X86_32
 	unsigned int reg;
+
 	__asm__ __volatile__ ("pushfl;"
 			      "popl %0;"
 			      "andl %1, %0;"
@@ -423,12 +477,12 @@ static inline void native_set_iopl_mask(unsigned mask)
 #endif
 }
 
-static inline void native_load_sp0(struct tss_struct *tss,
-				   struct thread_struct *thread)
+static inline void
+native_load_sp0(struct tss_struct *tss, struct thread_struct *thread)
 {
 	tss->x86_tss.sp0 = thread->sp0;
 #ifdef CONFIG_X86_32
-	/* Only happens when SEP is enabled, no need to test "SEP"arately */
+	/* Only happens when SEP is enabled, no need to test "SEP"arately: */
 	if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) {
 		tss->x86_tss.ss1 = thread->sysenter_cs;
 		wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
@@ -446,8 +500,8 @@ static inline void native_swapgs(void)
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
-#define __cpuid native_cpuid
-#define paravirt_enabled() 0
+#define __cpuid			native_cpuid
+#define paravirt_enabled()	0
 
 /*
  * These special macros can be used to get or set a debugging register
@@ -457,8 +511,8 @@ static inline void native_swapgs(void)
 #define set_debugreg(value, register)				\
 	native_set_debugreg(register, value)
 
-static inline void load_sp0(struct tss_struct *tss,
-			    struct thread_struct *thread)
+static inline void
+load_sp0(struct tss_struct *tss, struct thread_struct *thread)
 {
 	native_load_sp0(tss, thread);
 }
@@ -473,11 +527,12 @@ static inline void load_sp0(struct tss_struct *tss,
  * enable), so that any CPU's that boot up
  * after us can get the correct flags.
  */
-extern unsigned long mmu_cr4_features;
+extern unsigned long		mmu_cr4_features;
 
 static inline void set_in_cr4(unsigned long mask)
 {
 	unsigned cr4;
+
 	mmu_cr4_features |= mask;
 	cr4 = read_cr4();
 	cr4 |= mask;
@@ -487,6 +542,7 @@ static inline void set_in_cr4(unsigned long mask)
 static inline void clear_in_cr4(unsigned long mask)
 {
 	unsigned cr4;
+
 	mmu_cr4_features &= ~mask;
 	cr4 = read_cr4();
 	cr4 &= ~mask;
@@ -494,42 +550,42 @@ static inline void clear_in_cr4(unsigned long mask)
 }
 
 struct microcode_header {
-	unsigned int hdrver;
-	unsigned int rev;
-	unsigned int date;
-	unsigned int sig;
-	unsigned int cksum;
-	unsigned int ldrver;
-	unsigned int pf;
-	unsigned int datasize;
-	unsigned int totalsize;
-	unsigned int reserved[3];
+	unsigned int		hdrver;
+	unsigned int		rev;
+	unsigned int		date;
+	unsigned int		sig;
+	unsigned int		cksum;
+	unsigned int		ldrver;
+	unsigned int		pf;
+	unsigned int		datasize;
+	unsigned int		totalsize;
+	unsigned int		reserved[3];
 };
 
 struct microcode {
-	struct microcode_header hdr;
-	unsigned int bits[0];
+	struct microcode_header	hdr;
+	unsigned int		bits[0];
 };
 
-typedef struct microcode microcode_t;
-typedef struct microcode_header microcode_header_t;
+typedef struct microcode	microcode_t;
+typedef struct microcode_header	microcode_header_t;
 
 /* microcode format is extended from prescott processors */
 struct extended_signature {
-	unsigned int sig;
-	unsigned int pf;
-	unsigned int cksum;
+	unsigned int		sig;
+	unsigned int		pf;
+	unsigned int		cksum;
 };
 
 struct extended_sigtable {
-	unsigned int count;
-	unsigned int cksum;
-	unsigned int reserved[3];
+	unsigned int		count;
+	unsigned int		cksum;
+	unsigned int		reserved[3];
 	struct extended_signature sigs[0];
 };
 
 typedef struct {
-	unsigned long seg;
+	unsigned long		seg;
 } mm_segment_t;
 
 
@@ -541,7 +597,7 @@ extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
 /* Free all resources held by a thread. */
 extern void release_thread(struct task_struct *);
 
-/* Prepare to copy thread state - unlazy all lazy status */
+/* Prepare to copy thread state - unlazy all lazy state */
 extern void prepare_to_copy(struct task_struct *tsk);
 
 unsigned long get_wchan(struct task_struct *p);
@@ -578,118 +634,131 @@ static inline unsigned int cpuid_eax(unsigned int op)
 	unsigned int eax, ebx, ecx, edx;
 
 	cpuid(op, &eax, &ebx, &ecx, &edx);
+
 	return eax;
 }
+
 static inline unsigned int cpuid_ebx(unsigned int op)
 {
 	unsigned int eax, ebx, ecx, edx;
 
 	cpuid(op, &eax, &ebx, &ecx, &edx);
+
 	return ebx;
 }
+
 static inline unsigned int cpuid_ecx(unsigned int op)
 {
 	unsigned int eax, ebx, ecx, edx;
 
 	cpuid(op, &eax, &ebx, &ecx, &edx);
+
 	return ecx;
 }
+
 static inline unsigned int cpuid_edx(unsigned int op)
 {
 	unsigned int eax, ebx, ecx, edx;
 
 	cpuid(op, &eax, &ebx, &ecx, &edx);
+
 	return edx;
 }
 
 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
 static inline void rep_nop(void)
 {
-	__asm__ __volatile__("rep;nop": : :"memory");
+	__asm__ __volatile__("rep; nop" ::: "memory");
 }
 
-/* Stop speculative execution */
+static inline void cpu_relax(void)
+{
+	rep_nop();
+}
+
+/* Stop speculative execution: */
 static inline void sync_core(void)
 {
 	int tmp;
+
 	asm volatile("cpuid" : "=a" (tmp) : "0" (1)
 					  : "ebx", "ecx", "edx", "memory");
 }
 
-#define cpu_relax()   rep_nop()
-
-static inline void __monitor(const void *eax, unsigned long ecx,
-		unsigned long edx)
+static inline void
+__monitor(const void *eax, unsigned long ecx, unsigned long edx)
 {
-	/* "monitor %eax,%ecx,%edx;" */
+	/* "monitor %eax, %ecx, %edx;" */
 	asm volatile(
-		".byte 0x0f,0x01,0xc8;"
-		: :"a" (eax), "c" (ecx), "d"(edx));
+		".byte 0x0f, 0x01, 0xc8;"
+		:: "a" (eax), "c" (ecx), "d"(edx));
 }
 
 static inline void __mwait(unsigned long eax, unsigned long ecx)
 {
-	/* "mwait %eax,%ecx;" */
+	/* "mwait %eax, %ecx;" */
 	asm volatile(
-		".byte 0x0f,0x01,0xc9;"
-		: :"a" (eax), "c" (ecx));
+		".byte 0x0f, 0x01, 0xc9;"
+		:: "a" (eax), "c" (ecx));
 }
 
 static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
 {
-	/* "mwait %eax,%ecx;" */
+	/* "mwait %eax, %ecx;" */
 	asm volatile(
-		"sti; .byte 0x0f,0x01,0xc9;"
-		: :"a" (eax), "c" (ecx));
+		"sti; .byte 0x0f, 0x01, 0xc9;"
+		:: "a" (eax), "c" (ecx));
 }
 
 extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
 
-extern int force_mwait;
+extern int			force_mwait;
 
 extern void select_idle_routine(const struct cpuinfo_x86 *c);
 
-extern unsigned long boot_option_idle_override;
+extern unsigned long		boot_option_idle_override;
 
 extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
 /* Defined in head.S */
-extern struct desc_ptr early_gdt_descr;
+extern struct desc_ptr		early_gdt_descr;
 
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
 extern void cpu_init(void);
 extern void init_gdt(int cpu);
 
-/* from system description table in BIOS.  Mostly for MCA use, but
- * others may find it useful. */
-extern unsigned int machine_id;
-extern unsigned int machine_submodel_id;
-extern unsigned int BIOS_revision;
+/*
+ * from system description table in BIOS. Mostly for MCA use, but
+ * others may find it useful:
+ */
+extern unsigned int		machine_id;
+extern unsigned int		machine_submodel_id;
+extern unsigned int		BIOS_revision;
 
-/* Boot loader type from the setup header */
-extern int bootloader_type;
+/* Boot loader type from the setup header: */
+extern int			bootloader_type;
 
-extern char ignore_fpu_irq;
-#define cache_line_size() (boot_cpu_data.x86_cache_alignment)
+extern char			ignore_fpu_irq;
 
 #define HAVE_ARCH_PICK_MMAP_LAYOUT 1
 #define ARCH_HAS_PREFETCHW
 #define ARCH_HAS_SPINLOCK_PREFETCH
 
 #ifdef CONFIG_X86_32
-#define BASE_PREFETCH	ASM_NOP4
-#define ARCH_HAS_PREFETCH
+# define BASE_PREFETCH		ASM_NOP4
+# define ARCH_HAS_PREFETCH
 #else
-#define BASE_PREFETCH	"prefetcht0 (%1)"
+# define BASE_PREFETCH		"prefetcht0 (%1)"
 #endif
 
-/* Prefetch instructions for Pentium III and AMD Athlon */
-/* It's not worth to care about 3dnow! prefetches for the K6
-   because they are microcoded there and very slow.
-   However we don't do prefetches for pre XP Athlons currently
-   That should be fixed. */
+/*
+ * Prefetch instructions for Pentium III (+) and AMD Athlon (+)
+ *
+ * It's not worth to care about 3dnow prefetches for the K6
+ * because they are microcoded there and very slow.
+ */
 static inline void prefetch(const void *x)
 {
 	alternative_input(BASE_PREFETCH,
@@ -698,8 +767,11 @@ static inline void prefetch(const void *x)
 			  "r" (x));
 }
 
-/* 3dnow! prefetch to get an exclusive cache line. Useful for
-   spinlocks to avoid one state transition in the cache coherency protocol. */
+/*
+ * 3dnow prefetch to get an exclusive cache line.
+ * Useful for spinlocks to avoid one state transition in the
+ * cache coherency protocol:
+ */
 static inline void prefetchw(const void *x)
 {
 	alternative_input(BASE_PREFETCH,
@@ -708,21 +780,25 @@ static inline void prefetchw(const void *x)
 			  "r" (x));
 }
 
-#define spin_lock_prefetch(x)	prefetchw(x)
+static inline void spin_lock_prefetch(const void *x)
+{
+	prefetchw(x);
+}
+
 #ifdef CONFIG_X86_32
 /*
  * User space process size: 3GB (default).
  */
-#define TASK_SIZE	(PAGE_OFFSET)
-#define STACK_TOP	TASK_SIZE
-#define STACK_TOP_MAX	STACK_TOP
-
-#define INIT_THREAD  {							\
-	.sp0 = sizeof(init_stack) + (long)&init_stack,			\
-	.vm86_info = NULL,						\
-	.sysenter_cs = __KERNEL_CS,					\
-	.io_bitmap_ptr = NULL,						\
-	.fs = __KERNEL_PERCPU,						\
+#define TASK_SIZE		PAGE_OFFSET
+#define STACK_TOP		TASK_SIZE
+#define STACK_TOP_MAX		STACK_TOP
+
+#define INIT_THREAD  {							  \
+	.sp0			= sizeof(init_stack) + (long)&init_stack, \
+	.vm86_info		= NULL,					  \
+	.sysenter_cs		= __KERNEL_CS,				  \
+	.io_bitmap_ptr		= NULL,					  \
+	.fs			= __KERNEL_PERCPU,			  \
 }
 
 /*
@@ -731,26 +807,27 @@ static inline void prefetchw(const void *x)
  * permission bitmap. The extra byte must be all 1 bits, and must
  * be within the limit.
  */
-#define INIT_TSS  {							\
-	.x86_tss = {							\
+#define INIT_TSS  {							  \
+	.x86_tss = {							  \
 		.sp0		= sizeof(init_stack) + (long)&init_stack, \
-		.ss0		= __KERNEL_DS,				\
-		.ss1		= __KERNEL_CS,				\
-		.io_bitmap_base	= INVALID_IO_BITMAP_OFFSET,		\
-	 },								\
-	.io_bitmap	= { [0 ... IO_BITMAP_LONGS] = ~0 },		\
+		.ss0		= __KERNEL_DS,				  \
+		.ss1		= __KERNEL_CS,				  \
+		.io_bitmap_base	= INVALID_IO_BITMAP_OFFSET,		  \
+	 },								  \
+	.io_bitmap		= { [0 ... IO_BITMAP_LONGS] = ~0 },	  \
 }
 
-#define start_thread(regs, new_eip, new_esp) do {		\
+#define start_thread(regs, new_eip, new_esp)			\
+do {								\
 	__asm__("movl %0,%%gs": :"r" (0));			\
-	regs->fs = 0;						\
+	regs->fs		= 0;				\
 	set_fs(USER_DS);					\
-	regs->ds = __USER_DS;					\
-	regs->es = __USER_DS;					\
-	regs->ss = __USER_DS;					\
-	regs->cs = __USER_CS;					\
-	regs->ip = new_eip;					\
-	regs->sp = new_esp;					\
+	regs->ds		= __USER_DS;			\
+	regs->es		= __USER_DS;			\
+	regs->ss		= __USER_DS;			\
+	regs->cs		= __USER_CS;			\
+	regs->ip		= new_eip;			\
+	regs->sp		= new_esp;			\
 } while (0)
 
 
@@ -780,24 +857,24 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
        __regs__ - 1;                                                   \
 })
 
-#define KSTK_ESP(task) (task_pt_regs(task)->sp)
+#define KSTK_ESP(task)		(task_pt_regs(task)->sp)
 
 #else
 /*
  * User space process size. 47bits minus one guard page.
  */
-#define TASK_SIZE64	(0x800000000000UL - 4096)
+#define TASK_SIZE64		(0x800000000000UL - 4096)
 
 /* This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
  */
-#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
-			   0xc0000000 : 0xFFFFe000)
+#define IA32_PAGE_OFFSET	((current->personality & ADDR_LIMIT_3GB) ? \
+					0xc0000000 : 0xFFFFe000)
 
-#define TASK_SIZE 		(test_thread_flag(TIF_IA32) ? \
-				 IA32_PAGE_OFFSET : TASK_SIZE64)
-#define TASK_SIZE_OF(child) 	((test_tsk_thread_flag(child, TIF_IA32)) ? \
-				  IA32_PAGE_OFFSET : TASK_SIZE64)
+#define TASK_SIZE		(test_thread_flag(TIF_IA32) ? \
+					IA32_PAGE_OFFSET : TASK_SIZE64)
+#define TASK_SIZE_OF(child)	((test_tsk_thread_flag(child, TIF_IA32)) ? \
+					IA32_PAGE_OFFSET : TASK_SIZE64)
 
 #define STACK_TOP		TASK_SIZE
 #define STACK_TOP_MAX		TASK_SIZE64
@@ -813,12 +890,12 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
 #define start_thread(regs, new_rip, new_rsp) do { 			     \
 	asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0));  \
 	load_gs_index(0);						     \
-	(regs)->ip = (new_rip);						     \
-	(regs)->sp = (new_rsp);						     \
+	(regs)->ip		= (new_rip);				     \
+	(regs)->sp		= (new_rsp);				     \
 	write_pda(oldrsp, (new_rsp));					     \
-	(regs)->cs = __USER_CS;						     \
-	(regs)->ss = __USER_DS;						     \
-	(regs)->flags = 0x200;						     \
+	(regs)->cs		= __USER_CS;				     \
+	(regs)->ss		= __USER_DS;				     \
+	(regs)->flags		= 0x200;				     \
 	set_fs(USER_DS);						     \
 } while (0)
 
@@ -826,17 +903,18 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
  * Return saved PC of a blocked thread.
  * What is this good for? it will be always the scheduler or ret_from_fork.
  */
-#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
+#define thread_saved_pc(t)	(*(unsigned long *)((t)->thread.sp - 8))
 
-#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
-#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
+#define task_pt_regs(tsk)	((struct pt_regs *)(tsk)->thread.sp0 - 1)
+#define KSTK_ESP(tsk)		-1 /* sorry. doesn't work for syscall. */
 #endif /* CONFIG_X86_64 */
 
-/* This decides where the kernel will search for a free chunk of vm
+/*
+ * This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
  */
 #define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 3))
 
-#define KSTK_EIP(task) (task_pt_regs(task)->ip)
+#define KSTK_EIP(task)		(task_pt_regs(task)->ip)
 
 #endif