[PATCH] kexec code cleanup

o Following patch provides purely cosmetic changes and corrects CodingStyle
  guide lines related certain issues like below in kexec related files

  o braces for one line "if" statements, "for" loops,
  o more than 80 column wide lines,
  o No space after "while", "for" and "switch" key words

o Changes:
  o take-2: Removed the extra tab before "case" key words.
  o take-3: Put operator at the end of line and space before "*/"
Signed-off-by: NManeesh Soni <maneesh@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/i386/kernel/crash.c

@@ -31,10 +31,11 @@ note_buf_t crash_notes[NR_CPUS];
 /* This keeps a track of which one is crashing cpu. */
 static int crashing_cpu;
 
-static u32 *append_elf_note(u32 *buf,
-	char *name, unsigned type, void *data, size_t data_len)
+static u32 *append_elf_note(u32 *buf, char *name, unsigned type, void *data,
+							       size_t data_len)
 {
 	struct elf_note note;
+
 	note.n_namesz = strlen(name) + 1;
 	note.n_descsz = data_len;
 	note.n_type   = type;
@@ -44,26 +45,28 @@ static u32 *append_elf_note(u32 *buf,
 	buf += (note.n_namesz + 3)/4;
 	memcpy(buf, data, note.n_descsz);
 	buf += (note.n_descsz + 3)/4;
+
 	return buf;
 }
 
 static void final_note(u32 *buf)
 {
 	struct elf_note note;
+
 	note.n_namesz = 0;
 	note.n_descsz = 0;
 	note.n_type   = 0;
 	memcpy(buf, &note, sizeof(note));
 }
 
-
 static void crash_save_this_cpu(struct pt_regs *regs, int cpu)
 {
 	struct elf_prstatus prstatus;
 	u32 *buf;
-	if ((cpu < 0) || (cpu >= NR_CPUS)) {
+
+	if ((cpu < 0) || (cpu >= NR_CPUS))
 		return;
-	}
+
 	/* Using ELF notes here is opportunistic.
 	 * I need a well defined structure format
 	 * for the data I pass, and I need tags
@@ -75,9 +78,8 @@ static void crash_save_this_cpu(struct pt_regs *regs, int cpu)
 	memset(&prstatus, 0, sizeof(prstatus));
 	prstatus.pr_pid = current->pid;
 	elf_core_copy_regs(&prstatus.pr_reg, regs);
-	buf = append_elf_note(buf, "CORE", NT_PRSTATUS,
-		&prstatus, sizeof(prstatus));
-
+	buf = append_elf_note(buf, "CORE", NT_PRSTATUS, &prstatus,
+				sizeof(prstatus));
 	final_note(buf);
 }
 
@@ -119,8 +121,8 @@ static void crash_save_self(struct pt_regs *saved_regs)
 {
 	struct pt_regs regs;
 	int cpu;
-	cpu = smp_processor_id();
 
+	cpu = smp_processor_id();
 	if (saved_regs)
 		crash_setup_regs(&regs, saved_regs);
 	else
@@ -153,6 +155,7 @@ static int crash_nmi_callback(struct pt_regs *regs, int cpu)
 	/* Assume hlt works */
 	__asm__("hlt");
 	for(;;);
+
 	return 1;
 }
 
@@ -169,8 +172,8 @@ static void smp_send_nmi_allbutself(void)
 static void nmi_shootdown_cpus(void)
 {
 	unsigned long msecs;
-	atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
 
+	atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
 	/* Would it be better to replace the trap vector here? */
 	set_nmi_callback(crash_nmi_callback);
 	/* Ensure the new callback function is set before sending

arch/i386/kernel/machine_kexec.c

@@ -80,7 +80,8 @@ static void identity_map_page(unsigned long address)
 	/* Identity map the page table entry */
 	pgtable_level1[level1_index] = address | L0_ATTR;
 	pgtable_level2[level2_index] = __pa(pgtable_level1) | L1_ATTR;
-	set_64bit(&pgtable_level3[level3_index], __pa(pgtable_level2) | L2_ATTR);
+	set_64bit(&pgtable_level3[level3_index],
+					       __pa(pgtable_level2) | L2_ATTR);
 
 	/* Flush the tlb so the new mapping takes effect.
 	 * Global tlb entries are not flushed but that is not an issue.
@@ -139,8 +140,10 @@ static void load_segments(void)
 }
 
 typedef asmlinkage NORET_TYPE void (*relocate_new_kernel_t)(
-	unsigned long indirection_page, unsigned long reboot_code_buffer,
-	unsigned long start_address, unsigned int has_pae) ATTRIB_NORET;
+					unsigned long indirection_page,
+					unsigned long reboot_code_buffer,
+					unsigned long start_address,
+					unsigned int has_pae) ATTRIB_NORET;
 
 const extern unsigned char relocate_new_kernel[];
 extern void relocate_new_kernel_end(void);
@@ -180,20 +183,23 @@ NORET_TYPE void machine_kexec(struct kimage *image)
 {
 	unsigned long page_list;
 	unsigned long reboot_code_buffer;
+
 	relocate_new_kernel_t rnk;
 
 	/* Interrupts aren't acceptable while we reboot */
 	local_irq_disable();
 
 	/* Compute some offsets */
-	reboot_code_buffer = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
+	reboot_code_buffer = page_to_pfn(image->control_code_page)
+								<< PAGE_SHIFT;
 	page_list = image->head;
 
 	/* Set up an identity mapping for the reboot_code_buffer */
 	identity_map_page(reboot_code_buffer);
 
 	/* copy it out */
-	memcpy((void *)reboot_code_buffer, relocate_new_kernel, relocate_new_kernel_size);
+	memcpy((void *)reboot_code_buffer, relocate_new_kernel,
+						relocate_new_kernel_size);
 
 	/* The segment registers are funny things, they are
 	 * automatically loaded from a table, in memory wherever you

arch/ppc/kernel/machine_kexec.c

@@ -21,24 +21,23 @@
 #include <asm/machdep.h>
 
 typedef NORET_TYPE void (*relocate_new_kernel_t)(
-	unsigned long indirection_page, unsigned long reboot_code_buffer,
-	unsigned long start_address) ATTRIB_NORET;
+				unsigned long indirection_page,
+				unsigned long reboot_code_buffer,
+				unsigned long start_address) ATTRIB_NORET;
 
 const extern unsigned char relocate_new_kernel[];
 const extern unsigned int relocate_new_kernel_size;
 
 void machine_shutdown(void)
 {
-	if (ppc_md.machine_shutdown) {
+	if (ppc_md.machine_shutdown)
 		ppc_md.machine_shutdown();
-	}
 }
 
 void machine_crash_shutdown(struct pt_regs *regs)
 {
-	if (ppc_md.machine_crash_shutdown) {
+	if (ppc_md.machine_crash_shutdown)
 		ppc_md.machine_crash_shutdown();
-	}
 }
 
 /*
@@ -48,9 +47,8 @@ void machine_crash_shutdown(struct pt_regs *regs)
  */
 int machine_kexec_prepare(struct kimage *image)
 {
-	if (ppc_md.machine_kexec_prepare) {
+	if (ppc_md.machine_kexec_prepare)
 		return ppc_md.machine_kexec_prepare(image);
-	}
 	/*
 	 * Fail if platform doesn't provide its own machine_kexec_prepare
 	 * implementation.
@@ -60,9 +58,8 @@ int machine_kexec_prepare(struct kimage *image)
 
 void machine_kexec_cleanup(struct kimage *image)
 {
-	if (ppc_md.machine_kexec_cleanup) {
+	if (ppc_md.machine_kexec_cleanup)
 		ppc_md.machine_kexec_cleanup(image);
-	}
 }
 
 /*
@@ -71,9 +68,9 @@ void machine_kexec_cleanup(struct kimage *image)
  */
 NORET_TYPE void machine_kexec(struct kimage *image)
 {
-	if (ppc_md.machine_kexec) {
+	if (ppc_md.machine_kexec)
 		ppc_md.machine_kexec(image);
-	} else {
+	else {
 		/*
 		 * Fall back to normal restart if platform doesn't provide
 		 * its own kexec function, and user insist to kexec...
@@ -83,7 +80,6 @@ NORET_TYPE void machine_kexec(struct kimage *image)
 	for(;;);
 }
 
-
 /*
  * This is a generic machine_kexec function suitable at least for
  * non-OpenFirmware embedded platforms.
@@ -104,15 +100,15 @@ void machine_kexec_simple(struct kimage *image)
 
 	/* we need both effective and real address here */
 	reboot_code_buffer =
-		(unsigned long)page_address(image->control_code_page);
+			(unsigned long)page_address(image->control_code_page);
 	reboot_code_buffer_phys = virt_to_phys((void *)reboot_code_buffer);
 
 	/* copy our kernel relocation code to the control code page */
-	memcpy((void *)reboot_code_buffer,
-		relocate_new_kernel, relocate_new_kernel_size);
+	memcpy((void *)reboot_code_buffer, relocate_new_kernel,
+						relocate_new_kernel_size);
 
 	flush_icache_range(reboot_code_buffer,
-		reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
+				reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
 	printk(KERN_INFO "Bye!\n");
 
 	/* now call it */

arch/ppc64/kernel/machine_kexec.c

@@ -58,7 +58,7 @@ int machine_kexec_prepare(struct kimage *image)
 	 * handle the virtual mode, we must make sure no destination
 	 * overlaps kernel static data or bss.
 	 */
-	for(i = 0; i < image->nr_segments; i++)
+	for (i = 0; i < image->nr_segments; i++)
 		if (image->segment[i].mem < __pa(_end))
 			return -ETXTBSY;
 
@@ -76,7 +76,7 @@ int machine_kexec_prepare(struct kimage *image)
 		low = __pa(htab_address);
 		high = low + (htab_hash_mask + 1) * HASH_GROUP_SIZE;
 
-		for(i = 0; i < image->nr_segments; i++) {
+		for (i = 0; i < image->nr_segments; i++) {
 			begin = image->segment[i].mem;
 			end = begin + image->segment[i].memsz;
 
@@ -98,7 +98,7 @@ int machine_kexec_prepare(struct kimage *image)
 		low = *basep;
 		high = low + (*sizep);
 
-		for(i = 0; i < image->nr_segments; i++) {
+		for (i = 0; i < image->nr_segments; i++) {
 			begin = image->segment[i].mem;
 			end = begin + image->segment[i].memsz;
 
@@ -274,7 +274,8 @@ union thread_union kexec_stack
 
 /* Our assembly helper, in kexec_stub.S */
 extern NORET_TYPE void kexec_sequence(void *newstack, unsigned long start,
-	void *image, void *control, void (*clear_all)(void)) ATTRIB_NORET;
+					void *image, void *control,
+					void (*clear_all)(void)) ATTRIB_NORET;
 
 /* too late to fail here */
 void machine_kexec(struct kimage *image)

arch/s390/kernel/machine_kexec.c

@@ -67,7 +67,7 @@ machine_kexec(struct kimage *image)
 	ctl_clear_bit(0,28);
 
 	on_each_cpu(kexec_halt_all_cpus, image, 0, 0);
-	for(;;);
+	for (;;);
 }
 
 static void
@@ -85,7 +85,7 @@ kexec_halt_all_cpus(void *kernel_image)
 	for_each_online_cpu(cpu) {
 		if (cpu == smp_processor_id())
 			continue;
-		while(!smp_cpu_not_running(cpu))
+		while (!smp_cpu_not_running(cpu))
 			cpu_relax();
 	}
 

arch/x86_64/kernel/machine_kexec.c

@@ -32,29 +32,31 @@
 #define L2_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
 #define L3_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
 
-static void init_level2_page(
-	u64 *level2p, unsigned long addr)
+static void init_level2_page(u64 *level2p, unsigned long addr)
 {
 	unsigned long end_addr;
+
 	addr &= PAGE_MASK;
 	end_addr = addr + LEVEL2_SIZE;
-	while(addr < end_addr) {
+	while (addr < end_addr) {
 		*(level2p++) = addr | L1_ATTR;
 		addr += LEVEL1_SIZE;
 	}
 }
 
-static int init_level3_page(struct kimage *image,
-	u64 *level3p, unsigned long addr, unsigned long last_addr)
+static int init_level3_page(struct kimage *image, u64 *level3p,
+				unsigned long addr, unsigned long last_addr)
 {
 	unsigned long end_addr;
 	int result;
+
 	result = 0;
 	addr &= PAGE_MASK;
 	end_addr = addr + LEVEL3_SIZE;
-	while((addr < last_addr) && (addr < end_addr)) {
+	while ((addr < last_addr) && (addr < end_addr)) {
 		struct page *page;
 		u64 *level2p;
+
 		page = kimage_alloc_control_pages(image, 0);
 		if (!page) {
 			result = -ENOMEM;
@@ -66,7 +68,7 @@ static int init_level3_page(struct kimage *image,
 		addr += LEVEL2_SIZE;
 	}
 	/* clear the unused entries */
-	while(addr < end_addr) {
+	while (addr < end_addr) {
 		*(level3p++) = 0;
 		addr += LEVEL2_SIZE;
 	}
@@ -75,17 +77,19 @@ static int init_level3_page(struct kimage *image,
 }
 
 
-static int init_level4_page(struct kimage *image,
-	u64 *level4p, unsigned long addr, unsigned long last_addr)
+static int init_level4_page(struct kimage *image, u64 *level4p,
+				unsigned long addr, unsigned long last_addr)
 {
 	unsigned long end_addr;
 	int result;
+
 	result = 0;
 	addr &= PAGE_MASK;
 	end_addr = addr + LEVEL4_SIZE;
-	while((addr < last_addr) && (addr < end_addr)) {
+	while ((addr < last_addr) && (addr < end_addr)) {
 		struct page *page;
 		u64 *level3p;
+
 		page = kimage_alloc_control_pages(image, 0);
 		if (!page) {
 			result = -ENOMEM;
@@ -100,11 +104,11 @@ static int init_level4_page(struct kimage *image,
 		addr += LEVEL3_SIZE;
 	}
 	/* clear the unused entries */
-	while(addr < end_addr) {
+	while (addr < end_addr) {
 		*(level4p++) = 0;
 		addr += LEVEL3_SIZE;
 	}
- out:
+out:
 	return result;
 }
 
@@ -113,7 +117,7 @@ static int init_pgtable(struct kimage *image, unsigned long start_pgtable)
 {
 	u64 *level4p;
 	level4p = (u64 *)__va(start_pgtable);
-	return init_level4_page(image, level4p, 0, end_pfn << PAGE_SHIFT);
+ 	return init_level4_page(image, level4p, 0, end_pfn << PAGE_SHIFT);
 }
 
 static void set_idt(void *newidt, u16 limit)
@@ -159,9 +163,10 @@ static void load_segments(void)
 #undef __STR
 }
 
-typedef NORET_TYPE void (*relocate_new_kernel_t)(
-	unsigned long indirection_page, unsigned long control_code_buffer,
-	unsigned long start_address, unsigned long pgtable) ATTRIB_NORET;
+typedef NORET_TYPE void (*relocate_new_kernel_t)(unsigned long indirection_page,
+					unsigned long control_code_buffer,
+					unsigned long start_address,
+					unsigned long pgtable) ATTRIB_NORET;
 
 const extern unsigned char relocate_new_kernel[];
 const extern unsigned long relocate_new_kernel_size;
@@ -172,17 +177,17 @@ int machine_kexec_prepare(struct kimage *image)
 	int result;
 
 	/* Calculate the offsets */
-	start_pgtable       = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
+	start_pgtable = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
 	control_code_buffer = start_pgtable + 4096UL;
 
 	/* Setup the identity mapped 64bit page table */
 	result = init_pgtable(image, start_pgtable);
-	if (result) {
+	if (result)
 		return result;
-	}
 
 	/* Place the code in the reboot code buffer */
-	memcpy(__va(control_code_buffer), relocate_new_kernel, relocate_new_kernel_size);
+	memcpy(__va(control_code_buffer), relocate_new_kernel,
+						relocate_new_kernel_size);
 
 	return 0;
 }
@@ -207,8 +212,8 @@ NORET_TYPE void machine_kexec(struct kimage *image)
 	local_irq_disable();
 
 	/* Calculate the offsets */
-	page_list           = image->head;
-	start_pgtable       = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
+	page_list = image->head;
+	start_pgtable = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
 	control_code_buffer = start_pgtable + 4096UL;
 
 	/* Set the low half of the page table to my identity mapped

drivers/char/mem.c

@@ -287,7 +287,7 @@ static ssize_t read_oldmem(struct file *file, char __user *buf,
 	size_t read = 0, csize;
 	int rc = 0;
 
-	while(count) {
+	while (count) {
 		pfn = *ppos / PAGE_SIZE;
 		if (pfn > saved_max_pfn)
 			return read;

include/linux/kexec.h

@@ -91,14 +91,17 @@ extern NORET_TYPE void machine_kexec(struct kimage *image) ATTRIB_NORET;
 extern int machine_kexec_prepare(struct kimage *image);
 extern void machine_kexec_cleanup(struct kimage *image);
 extern asmlinkage long sys_kexec_load(unsigned long entry,
-	unsigned long nr_segments, struct kexec_segment __user *segments,
-	unsigned long flags);
+					unsigned long nr_segments,
+					struct kexec_segment __user *segments,
+					unsigned long flags);
 #ifdef CONFIG_COMPAT
 extern asmlinkage long compat_sys_kexec_load(unsigned long entry,
-	unsigned long nr_segments, struct compat_kexec_segment __user *segments,
-	unsigned long flags);
+				unsigned long nr_segments,
+				struct compat_kexec_segment __user *segments,
+				unsigned long flags);
 #endif
-extern struct page *kimage_alloc_control_pages(struct kimage *image, unsigned int order);
+extern struct page *kimage_alloc_control_pages(struct kimage *image,
+						unsigned int order);
 extern void crash_kexec(struct pt_regs *);
 int kexec_should_crash(struct task_struct *);
 extern struct kimage *kexec_image;

include/linux/syscalls.h

@@ -159,9 +159,9 @@ asmlinkage long sys_shutdown(int, int);
 asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd,
 				void __user *arg);
 asmlinkage long sys_restart_syscall(void);
-asmlinkage long sys_kexec_load(unsigned long entry,
-	unsigned long nr_segments, struct kexec_segment __user *segments,
-	unsigned long flags);
+asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments,
+				struct kexec_segment __user *segments,
+				unsigned long flags);
 
 asmlinkage long sys_exit(int error_code);
 asmlinkage void sys_exit_group(int error_code);