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Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Fix call to flush_ptrace_hw_breakpoint()
  powerpc/kexec: Restore ppc_md.machine_kexec
  powerpc/mm: Make hpte_need_flush() safe for preemption
This commit is contained in:
Linus Torvalds 2011-03-02 19:58:14 -08:00
parent c7b01d3dc2 e0780b720f
commit 8a304e5dfb
4 changed files with 18 additions and 7 deletions
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6
arch/powerpc/include/asm/machdep.h
View File

@ -240,6 +240,12 @@ struct machdep_calls {
* claims to support kexec.
*/
int (*machine_kexec_prepare)(struct kimage *image);
/* Called to perform the _real_ kexec.
* Do NOT allocate memory or fail here. We are past the point of
* no return.
*/
void (*machine_kexec)(struct kimage *image);
#endif /* CONFIG_KEXEC */
#ifdef CONFIG_SUSPEND

5
arch/powerpc/kernel/machine_kexec.c
View File

@ -87,7 +87,10 @@ void machine_kexec(struct kimage *image)
save_ftrace_enabled = __ftrace_enabled_save();
default_machine_kexec(image);
if (ppc_md.machine_kexec)
ppc_md.machine_kexec(image);
else
default_machine_kexec(image);
__ftrace_enabled_restore(save_ftrace_enabled);

8
arch/powerpc/kernel/process.c
View File

@ -353,6 +353,7 @@ static void switch_booke_debug_regs(struct thread_struct *new_thread)
prime_debug_regs(new_thread);
}
#else /* !CONFIG_PPC_ADV_DEBUG_REGS */
#ifndef CONFIG_HAVE_HW_BREAKPOINT
static void set_debug_reg_defaults(struct thread_struct *thread)
{
if (thread->dabr) {
@ -360,6 +361,7 @@ static void set_debug_reg_defaults(struct thread_struct *thread)
set_dabr(0);
}
}
#endif /* !CONFIG_HAVE_HW_BREAKPOINT */
#endif /* CONFIG_PPC_ADV_DEBUG_REGS */
int set_dabr(unsigned long dabr)
@ -670,11 +672,11 @@ void flush_thread(void)
{
discard_lazy_cpu_state();
#ifdef CONFIG_HAVE_HW_BREAKPOINTS
#ifdef CONFIG_HAVE_HW_BREAKPOINT
flush_ptrace_hw_breakpoint(current);
#else /* CONFIG_HAVE_HW_BREAKPOINTS */
#else /* CONFIG_HAVE_HW_BREAKPOINT */
set_debug_reg_defaults(&current->thread);
#endif /* CONFIG_HAVE_HW_BREAKPOINTS */
#endif /* CONFIG_HAVE_HW_BREAKPOINT */
}
void

6
arch/powerpc/mm/tlb_hash64.c
View File

@ -38,13 +38,11 @@ DEFINE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
* neesd to be flushed. This function will either perform the flush
* immediately or will batch it up if the current CPU has an active
* batch on it.
*
* Must be called from within some kind of spinlock/non-preempt region...
*/
void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, unsigned long pte, int huge)
{
struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
struct ppc64_tlb_batch *batch = &get_cpu_var(ppc64_tlb_batch);
unsigned long vsid, vaddr;
unsigned int psize;
int ssize;
@ -99,6 +97,7 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
*/
if (!batch->active) {
flush_hash_page(vaddr, rpte, psize, ssize, 0);
put_cpu_var(ppc64_tlb_batch);
return;
}
@ -127,6 +126,7 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
batch->index = ++i;
if (i >= PPC64_TLB_BATCH_NR)
__flush_tlb_pending(batch);
put_cpu_var(ppc64_tlb_batch);
}
/*