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uml: style fixes pass 1

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Formatting changes in the files which have been changed in the
tt-removal patchset so far.  These include:
	copyright updates
	header file trimming
	style fixes
	adding severity to printks
	indenting Kconfig help according to the predominant kernel style

These changes should be entirely non-functional.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Dike
2007-10-16 01:26:54 -07:00
committed by Linus Torvalds
parent c28b59d477
commit 4c9e138513
15 changed files with 278 additions and 309 deletions
Download Patch File Download Diff File Expand all files Collapse all files

111
arch/um/kernel/trap.c
View File

@@ -1,38 +1,24 @@
/*
* Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
#include "linux/kernel.h"
#include "asm/errno.h"
#include "linux/sched.h"
#include "linux/mm.h"
#include "linux/spinlock.h"
#include "linux/init.h"
#include "linux/ptrace.h"
#include "asm/semaphore.h"
#include "asm/pgtable.h"
#include "asm/pgalloc.h"
#include "asm/tlbflush.h"
#include "asm/a.out.h"
#include "asm/current.h"
#include "asm/irq.h"
#include "sysdep/sigcontext.h"
#include "kern_util.h"
#include "as-layout.h"
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/hardirq.h>
#include <asm/current.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include "arch.h"
#include "kern.h"
#include "chan_kern.h"
#include "mconsole_kern.h"
#include "mem.h"
#include "mem_kern.h"
#include "as-layout.h"
#include "kern_util.h"
#include "os.h"
#include "sysdep/sigcontext.h"
#include "sysdep/ptrace.h"
#include "os.h"
#include "skas.h"
#include "os.h"
/* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by segv(). */
/*
* Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by
* segv().
*/
int handle_page_fault(unsigned long address, unsigned long ip,
int is_write, int is_user, int *code_out)
{
@@ -46,31 +32,33 @@ int handle_page_fault(unsigned long address, unsigned long ip,
*code_out = SEGV_MAPERR;
/* If the fault was during atomic operation, don't take the fault, just
* fail. */
/*
* If the fault was during atomic operation, don't take the fault, just
* fail.
*/
if (in_atomic())
goto out_nosemaphore;
down_read(&mm->mmap_sem);
vma = find_vma(mm, address);
if(!vma)
if (!vma)
goto out;
else if(vma->vm_start <= address)
else if (vma->vm_start <= address)
goto good_area;
else if(!(vma->vm_flags & VM_GROWSDOWN))
else if (!(vma->vm_flags & VM_GROWSDOWN))
goto out;
else if(is_user && !ARCH_IS_STACKGROW(address))
else if (is_user && !ARCH_IS_STACKGROW(address))
goto out;
else if(expand_stack(vma, address))
else if (expand_stack(vma, address))
goto out;
good_area:
*code_out = SEGV_ACCERR;
if(is_write && !(vma->vm_flags & VM_WRITE))
if (is_write && !(vma->vm_flags & VM_WRITE))
goto out;
/* Don't require VM_READ|VM_EXEC for write faults! */
if(!is_write && !(vma->vm_flags & (VM_READ | VM_EXEC)))
if (!is_write && !(vma->vm_flags & (VM_READ | VM_EXEC)))
goto out;
do {
@@ -96,9 +84,10 @@ survive:
pud = pud_offset(pgd, address);
pmd = pmd_offset(pud, address);
pte = pte_offset_kernel(pmd, address);
} while(!pte_present(*pte));
} while (!pte_present(*pte));
err = 0;
/* The below warning was added in place of
/*
* The below warning was added in place of
* pte_mkyoung(); if (is_write) pte_mkdirty();
* If it's triggered, we'd see normally a hang here (a clean pte is
* marked read-only to emulate the dirty bit).
@@ -112,7 +101,7 @@ survive:
out:
up_read(&mm->mmap_sem);
out_nosemaphore:
return(err);
return err;
/*
* We ran out of memory, or some other thing happened to us that made
@@ -143,7 +132,7 @@ static void segv_handler(int sig, union uml_pt_regs *regs)
{
struct faultinfo * fi = UPT_FAULTINFO(regs);
if(UPT_IS_USER(regs) && !SEGV_IS_FIXABLE(fi)){
if (UPT_IS_USER(regs) && !SEGV_IS_FIXABLE(fi)) {
bad_segv(*fi, UPT_IP(regs));
return;
}
@@ -165,37 +154,41 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
int is_write = FAULT_WRITE(fi);
unsigned long address = FAULT_ADDRESS(fi);
if(!is_user && (address >= start_vm) && (address < end_vm)){
if (!is_user && (address >= start_vm) && (address < end_vm)) {
flush_tlb_kernel_vm();
return 0;
}
else if(current->mm == NULL) {
else if (current->mm == NULL) {
show_regs(container_of(regs, struct pt_regs, regs));
panic("Segfault with no mm");
panic("Segfault with no mm");
}
if (SEGV_IS_FIXABLE(&fi) || SEGV_MAYBE_FIXABLE(&fi))
err = handle_page_fault(address, ip, is_write, is_user, &si.si_code);
err = handle_page_fault(address, ip, is_write, is_user,
&si.si_code);
else {
err = -EFAULT;
/* A thread accessed NULL, we get a fault, but CR2 is invalid.
* This code is used in __do_copy_from_user() of TT mode. */
/*
* A thread accessed NULL, we get a fault, but CR2 is invalid.
* This code is used in __do_copy_from_user() of TT mode.
* XXX tt mode is gone, so maybe this isn't needed any more
*/
address = 0;
}
catcher = current->thread.fault_catcher;
if(!err)
if (!err)
return 0;
else if(catcher != NULL){
else if (catcher != NULL) {
current->thread.fault_addr = (void *) address;
do_longjmp(catcher, 1);
}
else if(current->thread.fault_addr != NULL)
else if (current->thread.fault_addr != NULL)
panic("fault_addr set but no fault catcher");
else if(!is_user && arch_fixup(ip, regs))
else if (!is_user && arch_fixup(ip, regs))
return 0;
if(!is_user) {
if (!is_user) {
show_regs(container_of(regs, struct pt_regs, regs));
panic("Kernel mode fault at addr 0x%lx, ip 0x%lx",
address, ip);
@@ -209,7 +202,7 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
current->thread.arch.faultinfo = fi;
force_sig_info(SIGBUS, &si, current);
} else if (err == -ENOMEM) {
printk("VM: killing process %s\n", current->comm);
printk(KERN_INFO "VM: killing process %s\n", current->comm);
do_exit(SIGKILL);
} else {
BUG_ON(err != -EFAULT);
@@ -223,13 +216,13 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user,
void relay_signal(int sig, union uml_pt_regs *regs)
{
if(arch_handle_signal(sig, regs))
if (arch_handle_signal(sig, regs))
return;
if(!UPT_IS_USER(regs)){
if(sig == SIGBUS)
printk("Bus error - the host /dev/shm or /tmp mount "
"likely just ran out of space\n");
if (!UPT_IS_USER(regs)) {
if (sig == SIGBUS)
printk(KERN_ERR "Bus error - the host /dev/shm or /tmp "
"mount likely just ran out of space\n");
panic("Kernel mode signal %d", sig);
}
@@ -239,7 +232,7 @@ void relay_signal(int sig, union uml_pt_regs *regs)
static void bus_handler(int sig, union uml_pt_regs *regs)
{
if(current->thread.fault_catcher != NULL)
if (current->thread.fault_catcher != NULL)
do_longjmp(current->thread.fault_catcher, 1);
else relay_signal(sig, regs);
}