[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: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c
index 8bdb4b6..e5fab12 100644
--- a/arch/i386/kernel/crash.c
+++ b/arch/i386/kernel/crash.c
@@ -31,10 +31,11 @@
/* 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 @@
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, ¬e, 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 @@
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 @@
{
struct pt_regs regs;
int cpu;
- cpu = smp_processor_id();
+ cpu = smp_processor_id();
if (saved_regs)
crash_setup_regs(®s, saved_regs);
else
@@ -153,6 +155,7 @@
/* Assume hlt works */
__asm__("hlt");
for(;;);
+
return 1;
}
@@ -169,8 +172,8 @@
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
diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c
index 67188041..52ed18d 100644
--- a/arch/i386/kernel/machine_kexec.c
+++ b/arch/i386/kernel/machine_kexec.c
@@ -80,7 +80,8 @@
/* 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 @@
}
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 @@
{
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
diff --git a/arch/ppc/kernel/machine_kexec.c b/arch/ppc/kernel/machine_kexec.c
index b825353..84d65a8 100644
--- a/arch/ppc/kernel/machine_kexec.c
+++ b/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 @@
*/
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 @@
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 @@
*/
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 @@
for(;;);
}
-
/*
* This is a generic machine_kexec function suitable at least for
* non-OpenFirmware embedded platforms.
@@ -104,15 +100,15 @@
/* 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 */
diff --git a/arch/ppc64/kernel/machine_kexec.c b/arch/ppc64/kernel/machine_kexec.c
index 06b25b5..fdb2fc6 100644
--- a/arch/ppc64/kernel/machine_kexec.c
+++ b/arch/ppc64/kernel/machine_kexec.c
@@ -58,7 +58,7 @@
* 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 @@
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 @@
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 @@
/* 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)
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 7a94db7..2721c3a 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -67,7 +67,7 @@
ctl_clear_bit(0,28);
on_each_cpu(kexec_halt_all_cpus, image, 0, 0);
- for(;;);
+ for (;;);
}
static void
@@ -85,7 +85,7 @@
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();
}
diff --git a/arch/x86_64/kernel/machine_kexec.c b/arch/x86_64/kernel/machine_kexec.c
index 200b599..60d1eff 100644
--- a/arch/x86_64/kernel/machine_kexec.c
+++ b/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 @@
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_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 @@
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 @@
{
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 @@
#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 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 @@
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
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index b64108d..4218738 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -287,7 +287,7 @@
size_t read = 0, csize;
int rc = 0;
- while(count) {
+ while (count) {
pfn = *ppos / PAGE_SIZE;
if (pfn > saved_max_pfn)
return read;
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 7383173..c846847 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -91,14 +91,17 @@
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;
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 7ba8f8f..52830b6 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -159,9 +159,9 @@
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);
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 277f22a..7843548 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -87,12 +87,15 @@
*/
#define KIMAGE_NO_DEST (-1UL)
-static int kimage_is_destination_range(
- struct kimage *image, unsigned long start, unsigned long end);
-static struct page *kimage_alloc_page(struct kimage *image, unsigned int gfp_mask, unsigned long dest);
+static int kimage_is_destination_range(struct kimage *image,
+ unsigned long start, unsigned long end);
+static struct page *kimage_alloc_page(struct kimage *image,
+ unsigned int gfp_mask,
+ unsigned long dest);
static int do_kimage_alloc(struct kimage **rimage, unsigned long entry,
- unsigned long nr_segments, struct kexec_segment __user *segments)
+ unsigned long nr_segments,
+ struct kexec_segment __user *segments)
{
size_t segment_bytes;
struct kimage *image;
@@ -102,9 +105,9 @@
/* Allocate a controlling structure */
result = -ENOMEM;
image = kmalloc(sizeof(*image), GFP_KERNEL);
- if (!image) {
+ if (!image)
goto out;
- }
+
memset(image, 0, sizeof(*image));
image->head = 0;
image->entry = &image->head;
@@ -145,6 +148,7 @@
result = -EADDRNOTAVAIL;
for (i = 0; i < nr_segments; i++) {
unsigned long mstart, mend;
+
mstart = image->segment[i].mem;
mend = mstart + image->segment[i].memsz;
if ((mstart & ~PAGE_MASK) || (mend & ~PAGE_MASK))
@@ -159,12 +163,13 @@
* easy explanation as one segment stops on another.
*/
result = -EINVAL;
- for(i = 0; i < nr_segments; i++) {
+ for (i = 0; i < nr_segments; i++) {
unsigned long mstart, mend;
unsigned long j;
+
mstart = image->segment[i].mem;
mend = mstart + image->segment[i].memsz;
- for(j = 0; j < i; j++) {
+ for (j = 0; j < i; j++) {
unsigned long pstart, pend;
pstart = image->segment[j].mem;
pend = pstart + image->segment[j].memsz;
@@ -180,25 +185,25 @@
* later on.
*/
result = -EINVAL;
- for(i = 0; i < nr_segments; i++) {
+ for (i = 0; i < nr_segments; i++) {
if (image->segment[i].bufsz > image->segment[i].memsz)
goto out;
}
-
result = 0;
- out:
- if (result == 0) {
+out:
+ if (result == 0)
*rimage = image;
- } else {
+ else
kfree(image);
- }
+
return result;
}
static int kimage_normal_alloc(struct kimage **rimage, unsigned long entry,
- unsigned long nr_segments, struct kexec_segment __user *segments)
+ unsigned long nr_segments,
+ struct kexec_segment __user *segments)
{
int result;
struct kimage *image;
@@ -206,9 +211,9 @@
/* Allocate and initialize a controlling structure */
image = NULL;
result = do_kimage_alloc(&image, entry, nr_segments, segments);
- if (result) {
+ if (result)
goto out;
- }
+
*rimage = image;
/*
@@ -218,7 +223,7 @@
*/
result = -ENOMEM;
image->control_code_page = kimage_alloc_control_pages(image,
- get_order(KEXEC_CONTROL_CODE_SIZE));
+ get_order(KEXEC_CONTROL_CODE_SIZE));
if (!image->control_code_page) {
printk(KERN_ERR "Could not allocate control_code_buffer\n");
goto out;
@@ -226,16 +231,17 @@
result = 0;
out:
- if (result == 0) {
+ if (result == 0)
*rimage = image;
- } else {
+ else
kfree(image);
- }
+
return result;
}
static int kimage_crash_alloc(struct kimage **rimage, unsigned long entry,
- unsigned long nr_segments, struct kexec_segment *segments)
+ unsigned long nr_segments,
+ struct kexec_segment *segments)
{
int result;
struct kimage *image;
@@ -250,9 +256,8 @@
/* Allocate and initialize a controlling structure */
result = do_kimage_alloc(&image, entry, nr_segments, segments);
- if (result) {
+ if (result)
goto out;
- }
/* Enable the special crash kernel control page
* allocation policy.
@@ -272,6 +277,7 @@
result = -EADDRNOTAVAIL;
for (i = 0; i < nr_segments; i++) {
unsigned long mstart, mend;
+
mstart = image->segment[i].mem;
mend = mstart + image->segment[i].memsz - 1;
/* Ensure we are within the crash kernel limits */
@@ -279,7 +285,6 @@
goto out;
}
-
/*
* Find a location for the control code buffer, and add
* the vector of segments so that it's pages will also be
@@ -287,80 +292,84 @@
*/
result = -ENOMEM;
image->control_code_page = kimage_alloc_control_pages(image,
- get_order(KEXEC_CONTROL_CODE_SIZE));
+ get_order(KEXEC_CONTROL_CODE_SIZE));
if (!image->control_code_page) {
printk(KERN_ERR "Could not allocate control_code_buffer\n");
goto out;
}
result = 0;
- out:
- if (result == 0) {
+out:
+ if (result == 0)
*rimage = image;
- } else {
+ else
kfree(image);
- }
+
return result;
}
-static int kimage_is_destination_range(
- struct kimage *image, unsigned long start, unsigned long end)
+static int kimage_is_destination_range(struct kimage *image,
+ unsigned long start,
+ unsigned long end)
{
unsigned long i;
for (i = 0; i < image->nr_segments; i++) {
unsigned long mstart, mend;
+
mstart = image->segment[i].mem;
- mend = mstart + image->segment[i].memsz;
- if ((end > mstart) && (start < mend)) {
+ mend = mstart + image->segment[i].memsz;
+ if ((end > mstart) && (start < mend))
return 1;
- }
}
+
return 0;
}
-static struct page *kimage_alloc_pages(unsigned int gfp_mask, unsigned int order)
+static struct page *kimage_alloc_pages(unsigned int gfp_mask,
+ unsigned int order)
{
struct page *pages;
+
pages = alloc_pages(gfp_mask, order);
if (pages) {
unsigned int count, i;
pages->mapping = NULL;
pages->private = order;
count = 1 << order;
- for(i = 0; i < count; i++) {
+ for (i = 0; i < count; i++)
SetPageReserved(pages + i);
- }
}
+
return pages;
}
static void kimage_free_pages(struct page *page)
{
unsigned int order, count, i;
+
order = page->private;
count = 1 << order;
- for(i = 0; i < count; i++) {
+ for (i = 0; i < count; i++)
ClearPageReserved(page + i);
- }
__free_pages(page, order);
}
static void kimage_free_page_list(struct list_head *list)
{
struct list_head *pos, *next;
+
list_for_each_safe(pos, next, list) {
struct page *page;
page = list_entry(pos, struct page, lru);
list_del(&page->lru);
-
kimage_free_pages(page);
}
}
-static struct page *kimage_alloc_normal_control_pages(
- struct kimage *image, unsigned int order)
+static struct page *kimage_alloc_normal_control_pages(struct kimage *image,
+ unsigned int order)
{
/* Control pages are special, they are the intermediaries
* that are needed while we copy the rest of the pages
@@ -387,6 +396,7 @@
*/
do {
unsigned long pfn, epfn, addr, eaddr;
+
pages = kimage_alloc_pages(GFP_KERNEL, order);
if (!pages)
break;
@@ -395,12 +405,12 @@
addr = pfn << PAGE_SHIFT;
eaddr = epfn << PAGE_SHIFT;
if ((epfn >= (KEXEC_CONTROL_MEMORY_LIMIT >> PAGE_SHIFT)) ||
- kimage_is_destination_range(image, addr, eaddr))
- {
+ kimage_is_destination_range(image, addr, eaddr)) {
list_add(&pages->lru, &extra_pages);
pages = NULL;
}
- } while(!pages);
+ } while (!pages);
+
if (pages) {
/* Remember the allocated page... */
list_add(&pages->lru, &image->control_pages);
@@ -420,12 +430,12 @@
* For now it is simpler to just free the pages.
*/
kimage_free_page_list(&extra_pages);
- return pages;
+ return pages;
}
-static struct page *kimage_alloc_crash_control_pages(
- struct kimage *image, unsigned int order)
+static struct page *kimage_alloc_crash_control_pages(struct kimage *image,
+ unsigned int order)
{
/* Control pages are special, they are the intermediaries
* that are needed while we copy the rest of the pages
@@ -450,21 +460,22 @@
*/
unsigned long hole_start, hole_end, size;
struct page *pages;
+
pages = NULL;
size = (1 << order) << PAGE_SHIFT;
hole_start = (image->control_page + (size - 1)) & ~(size - 1);
hole_end = hole_start + size - 1;
- while(hole_end <= crashk_res.end) {
+ while (hole_end <= crashk_res.end) {
unsigned long i;
- if (hole_end > KEXEC_CONTROL_MEMORY_LIMIT) {
+
+ if (hole_end > KEXEC_CONTROL_MEMORY_LIMIT)
break;
- }
- if (hole_end > crashk_res.end) {
+ if (hole_end > crashk_res.end)
break;
- }
/* See if I overlap any of the segments */
- for(i = 0; i < image->nr_segments; i++) {
+ for (i = 0; i < image->nr_segments; i++) {
unsigned long mstart, mend;
+
mstart = image->segment[i].mem;
mend = mstart + image->segment[i].memsz - 1;
if ((hole_end >= mstart) && (hole_start <= mend)) {
@@ -480,18 +491,19 @@
break;
}
}
- if (pages) {
+ if (pages)
image->control_page = hole_end;
- }
+
return pages;
}
-struct page *kimage_alloc_control_pages(
- struct kimage *image, unsigned int order)
+struct page *kimage_alloc_control_pages(struct kimage *image,
+ unsigned int order)
{
struct page *pages = NULL;
- switch(image->type) {
+
+ switch (image->type) {
case KEXEC_TYPE_DEFAULT:
pages = kimage_alloc_normal_control_pages(image, order);
break;
@@ -499,43 +511,46 @@
pages = kimage_alloc_crash_control_pages(image, order);
break;
}
+
return pages;
}
static int kimage_add_entry(struct kimage *image, kimage_entry_t entry)
{
- if (*image->entry != 0) {
+ if (*image->entry != 0)
image->entry++;
- }
+
if (image->entry == image->last_entry) {
kimage_entry_t *ind_page;
struct page *page;
+
page = kimage_alloc_page(image, GFP_KERNEL, KIMAGE_NO_DEST);
- if (!page) {
+ if (!page)
return -ENOMEM;
- }
+
ind_page = page_address(page);
*image->entry = virt_to_phys(ind_page) | IND_INDIRECTION;
image->entry = ind_page;
- image->last_entry =
- ind_page + ((PAGE_SIZE/sizeof(kimage_entry_t)) - 1);
+ image->last_entry = ind_page +
+ ((PAGE_SIZE/sizeof(kimage_entry_t)) - 1);
}
*image->entry = entry;
image->entry++;
*image->entry = 0;
+
return 0;
}
-static int kimage_set_destination(
- struct kimage *image, unsigned long destination)
+static int kimage_set_destination(struct kimage *image,
+ unsigned long destination)
{
int result;
destination &= PAGE_MASK;
result = kimage_add_entry(image, destination | IND_DESTINATION);
- if (result == 0) {
+ if (result == 0)
image->destination = destination;
- }
+
return result;
}
@@ -546,9 +561,9 @@
page &= PAGE_MASK;
result = kimage_add_entry(image, page | IND_SOURCE);
- if (result == 0) {
+ if (result == 0)
image->destination += PAGE_SIZE;
- }
+
return result;
}
@@ -564,10 +579,11 @@
}
static int kimage_terminate(struct kimage *image)
{
- if (*image->entry != 0) {
+ if (*image->entry != 0)
image->entry++;
- }
+
*image->entry = IND_DONE;
+
return 0;
}
@@ -591,26 +607,24 @@
if (!image)
return;
+
kimage_free_extra_pages(image);
for_each_kimage_entry(image, ptr, entry) {
if (entry & IND_INDIRECTION) {
/* Free the previous indirection page */
- if (ind & IND_INDIRECTION) {
+ if (ind & IND_INDIRECTION)
kimage_free_entry(ind);
- }
/* Save this indirection page until we are
* done with it.
*/
ind = entry;
}
- else if (entry & IND_SOURCE) {
+ else if (entry & IND_SOURCE)
kimage_free_entry(entry);
- }
}
/* Free the final indirection page */
- if (ind & IND_INDIRECTION) {
+ if (ind & IND_INDIRECTION)
kimage_free_entry(ind);
- }
/* Handle any machine specific cleanup */
machine_kexec_cleanup(image);
@@ -620,26 +634,28 @@
kfree(image);
}
-static kimage_entry_t *kimage_dst_used(struct kimage *image, unsigned long page)
+static kimage_entry_t *kimage_dst_used(struct kimage *image,
+ unsigned long page)
{
kimage_entry_t *ptr, entry;
unsigned long destination = 0;
for_each_kimage_entry(image, ptr, entry) {
- if (entry & IND_DESTINATION) {
+ if (entry & IND_DESTINATION)
destination = entry & PAGE_MASK;
- }
else if (entry & IND_SOURCE) {
- if (page == destination) {
+ if (page == destination)
return ptr;
- }
destination += PAGE_SIZE;
}
}
+
return 0;
}
-static struct page *kimage_alloc_page(struct kimage *image, unsigned int gfp_mask, unsigned long destination)
+static struct page *kimage_alloc_page(struct kimage *image,
+ unsigned int gfp_mask,
+ unsigned long destination)
{
/*
* Here we implement safeguards to ensure that a source page
@@ -679,11 +695,11 @@
/* Allocate a page, if we run out of memory give up */
page = kimage_alloc_pages(gfp_mask, 0);
- if (!page) {
+ if (!page)
return 0;
- }
/* If the page cannot be used file it away */
- if (page_to_pfn(page) > (KEXEC_SOURCE_MEMORY_LIMIT >> PAGE_SHIFT)) {
+ if (page_to_pfn(page) >
+ (KEXEC_SOURCE_MEMORY_LIMIT >> PAGE_SHIFT)) {
list_add(&page->lru, &image->unuseable_pages);
continue;
}
@@ -694,7 +710,8 @@
break;
/* If the page is not a destination page use it */
- if (!kimage_is_destination_range(image, addr, addr + PAGE_SIZE))
+ if (!kimage_is_destination_range(image, addr,
+ addr + PAGE_SIZE))
break;
/*
@@ -727,11 +744,12 @@
list_add(&page->lru, &image->dest_pages);
}
}
+
return page;
}
static int kimage_load_normal_segment(struct kimage *image,
- struct kexec_segment *segment)
+ struct kexec_segment *segment)
{
unsigned long maddr;
unsigned long ubytes, mbytes;
@@ -745,34 +763,36 @@
maddr = segment->mem;
result = kimage_set_destination(image, maddr);
- if (result < 0) {
+ if (result < 0)
goto out;
- }
- while(mbytes) {
+
+ while (mbytes) {
struct page *page;
char *ptr;
size_t uchunk, mchunk;
+
page = kimage_alloc_page(image, GFP_HIGHUSER, maddr);
if (page == 0) {
result = -ENOMEM;
goto out;
}
- result = kimage_add_page(image, page_to_pfn(page) << PAGE_SHIFT);
- if (result < 0) {
+ result = kimage_add_page(image, page_to_pfn(page)
+ << PAGE_SHIFT);
+ if (result < 0)
goto out;
- }
+
ptr = kmap(page);
/* Start with a clear page */
memset(ptr, 0, PAGE_SIZE);
ptr += maddr & ~PAGE_MASK;
mchunk = PAGE_SIZE - (maddr & ~PAGE_MASK);
- if (mchunk > mbytes) {
+ if (mchunk > mbytes)
mchunk = mbytes;
- }
+
uchunk = mchunk;
- if (uchunk > ubytes) {
+ if (uchunk > ubytes)
uchunk = ubytes;
- }
+
result = copy_from_user(ptr, buf, uchunk);
kunmap(page);
if (result) {
@@ -784,12 +804,12 @@
buf += mchunk;
mbytes -= mchunk;
}
- out:
+out:
return result;
}
static int kimage_load_crash_segment(struct kimage *image,
- struct kexec_segment *segment)
+ struct kexec_segment *segment)
{
/* For crash dumps kernels we simply copy the data from
* user space to it's destination.
@@ -805,10 +825,11 @@
ubytes = segment->bufsz;
mbytes = segment->memsz;
maddr = segment->mem;
- while(mbytes) {
+ while (mbytes) {
struct page *page;
char *ptr;
size_t uchunk, mchunk;
+
page = pfn_to_page(maddr >> PAGE_SHIFT);
if (page == 0) {
result = -ENOMEM;
@@ -817,9 +838,9 @@
ptr = kmap(page);
ptr += maddr & ~PAGE_MASK;
mchunk = PAGE_SIZE - (maddr & ~PAGE_MASK);
- if (mchunk > mbytes) {
+ if (mchunk > mbytes)
mchunk = mbytes;
- }
+
uchunk = mchunk;
if (uchunk > ubytes) {
uchunk = ubytes;
@@ -837,15 +858,16 @@
buf += mchunk;
mbytes -= mchunk;
}
- out:
+out:
return result;
}
static int kimage_load_segment(struct kimage *image,
- struct kexec_segment *segment)
+ struct kexec_segment *segment)
{
int result = -ENOMEM;
- switch(image->type) {
+
+ switch (image->type) {
case KEXEC_TYPE_DEFAULT:
result = kimage_load_normal_segment(image, segment);
break;
@@ -853,6 +875,7 @@
result = kimage_load_crash_segment(image, segment);
break;
}
+
return result;
}
@@ -885,9 +908,9 @@
*/
static int kexec_lock = 0;
-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)
{
struct kimage **dest_image, *image;
int locked;
@@ -907,9 +930,7 @@
/* Verify we are on the appropriate architecture */
if (((flags & KEXEC_ARCH_MASK) != KEXEC_ARCH) &&
((flags & KEXEC_ARCH_MASK) != KEXEC_ARCH_DEFAULT))
- {
return -EINVAL;
- }
/* Put an artificial cap on the number
* of segments passed to kexec_load.
@@ -929,58 +950,59 @@
* KISS: always take the mutex.
*/
locked = xchg(&kexec_lock, 1);
- if (locked) {
+ if (locked)
return -EBUSY;
- }
+
dest_image = &kexec_image;
- if (flags & KEXEC_ON_CRASH) {
+ if (flags & KEXEC_ON_CRASH)
dest_image = &kexec_crash_image;
- }
if (nr_segments > 0) {
unsigned long i;
+
/* Loading another kernel to reboot into */
- if ((flags & KEXEC_ON_CRASH) == 0) {
- result = kimage_normal_alloc(&image, entry, nr_segments, segments);
- }
+ if ((flags & KEXEC_ON_CRASH) == 0)
+ result = kimage_normal_alloc(&image, entry,
+ nr_segments, segments);
/* Loading another kernel to switch to if this one crashes */
else if (flags & KEXEC_ON_CRASH) {
/* Free any current crash dump kernel before
* we corrupt it.
*/
kimage_free(xchg(&kexec_crash_image, NULL));
- result = kimage_crash_alloc(&image, entry, nr_segments, segments);
+ result = kimage_crash_alloc(&image, entry,
+ nr_segments, segments);
}
- if (result) {
+ if (result)
goto out;
- }
+
result = machine_kexec_prepare(image);
- if (result) {
+ if (result)
goto out;
- }
- for(i = 0; i < nr_segments; i++) {
+
+ for (i = 0; i < nr_segments; i++) {
result = kimage_load_segment(image, &image->segment[i]);
- if (result) {
+ if (result)
goto out;
- }
}
result = kimage_terminate(image);
- if (result) {
+ if (result)
goto out;
- }
}
/* Install the new kernel, and Uninstall the old */
image = xchg(dest_image, image);
- out:
+out:
xchg(&kexec_lock, 0); /* Release the mutex */
kimage_free(image);
+
return result;
}
#ifdef CONFIG_COMPAT
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)
{
struct compat_kexec_segment in;
struct kexec_segment out, __user *ksegments;
@@ -989,20 +1011,17 @@
/* Don't allow clients that don't understand the native
* architecture to do anything.
*/
- if ((flags & KEXEC_ARCH_MASK) == KEXEC_ARCH_DEFAULT) {
+ if ((flags & KEXEC_ARCH_MASK) == KEXEC_ARCH_DEFAULT)
return -EINVAL;
- }
- if (nr_segments > KEXEC_SEGMENT_MAX) {
+ if (nr_segments > KEXEC_SEGMENT_MAX)
return -EINVAL;
- }
ksegments = compat_alloc_user_space(nr_segments * sizeof(out));
for (i=0; i < nr_segments; i++) {
result = copy_from_user(&in, &segments[i], sizeof(in));
- if (result) {
+ if (result)
return -EFAULT;
- }
out.buf = compat_ptr(in.buf);
out.bufsz = in.bufsz;
@@ -1010,9 +1029,8 @@
out.memsz = in.memsz;
result = copy_to_user(&ksegments[i], &out, sizeof(out));
- if (result) {
+ if (result)
return -EFAULT;
- }
}
return sys_kexec_load(entry, nr_segments, ksegments, flags);
