diff options
| author | Harvey Harrison <harvey.harrison@gmail.com> | 2008-01-30 13:34:11 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:34:11 +0100 |
| commit | fd40d6e3188b12c59696d6cb4a6f26333814d66f (patch) | |
| tree | 501f109ea72beaf113b417feb71746afec18f7a0 /arch/x86/mm/fault.c | |
| parent | 5b727a3b0158a129827c21ce3bfb0ba997e8ddd0 (diff) | |
x86: shrink some ifdefs in fault.c
The change from current to tsk in do_page_fault is safe as
this is set at the very beginning of the function.
Removes a likely() annotation from the 64-bit version, this
could have instead been added to 32-bit.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm/fault.c')
| -rw-r--r-- | arch/x86/mm/fault.c | 43 |
1 files changed, 14 insertions, 29 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 1c836527dde7..72547a7e32c6 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -378,6 +378,7 @@ static void show_fault_oops(struct pt_regs *regs, unsigned long error_code, #ifdef CONFIG_X86_32 if (!oops_may_print()) return; +#endif #ifdef CONFIG_X86_PAE if (error_code & PF_INSTR) { @@ -390,28 +391,20 @@ static void show_fault_oops(struct pt_regs *regs, unsigned long error_code, "(uid: %d)\n", current->uid); } #endif - printk(KERN_ALERT "BUG: unable to handle kernel "); - if (address < PAGE_SIZE) - printk(KERN_CONT "NULL pointer dereference"); - else - printk(KERN_CONT "paging request"); - printk(KERN_CONT " at %08lx\n", address); - printk(KERN_ALERT "IP:"); - printk_address(regs->ip, 1); - dump_pagetable(address); -#else /* CONFIG_X86_64 */ printk(KERN_ALERT "BUG: unable to handle kernel "); if (address < PAGE_SIZE) printk(KERN_CONT "NULL pointer dereference"); else printk(KERN_CONT "paging request"); +#ifdef CONFIG_X86_32 + printk(KERN_CONT " at %08lx\n", address); +#else printk(KERN_CONT " at %016lx\n", address); - +#endif printk(KERN_ALERT "IP:"); printk_address(regs->ip, 1); dump_pagetable(address); -#endif } #ifdef CONFIG_X86_64 @@ -705,11 +698,7 @@ again: vma = find_vma(mm, address); if (!vma) goto bad_area; -#ifdef CONFIG_X86_32 if (vma->vm_start <= address) -#else - if (likely(vma->vm_start <= address)) -#endif goto good_area; if (!(vma->vm_flags & VM_GROWSDOWN)) goto bad_area; @@ -858,23 +847,21 @@ no_context: */ #ifdef CONFIG_X86_32 bust_spinlocks(1); +#else + flags = oops_begin(); +#endif show_fault_oops(regs, error_code, address); tsk->thread.cr2 = address; tsk->thread.trap_no = 14; tsk->thread.error_code = error_code; + +#ifdef CONFIG_X86_32 die("Oops", regs, error_code); bust_spinlocks(0); do_exit(SIGKILL); -#else /* CONFIG_X86_64 */ - flags = oops_begin(); - - show_fault_oops(regs, error_code, address); - - tsk->thread.cr2 = address; - tsk->thread.trap_no = 14; - tsk->thread.error_code = error_code; +#else if (__die("Oops", regs, error_code)) regs = NULL; /* Executive summary in case the body of the oops scrolled away */ @@ -888,18 +875,16 @@ no_context: */ out_of_memory: up_read(&mm->mmap_sem); -#ifdef CONFIG_X86_32 if (is_global_init(tsk)) { yield(); +#ifdef CONFIG_X86_32 down_read(&mm->mmap_sem); goto survive; - } #else - if (is_global_init(current)) { - yield(); goto again; - } #endif + } + printk("VM: killing process %s\n", tsk->comm); if (error_code & PF_USER) do_group_exit(SIGKILL); |