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Commit 35010334 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'x86-fixes-for-linus' of... 

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, vm86: fix preemption bug
  x86, olpc: fix model detection without OFW
  x86, hpet: fix for LS21 + HPET = boot hang
  x86: CPA avoid repeated lazy mmu flush
  x86: warn if arch_flush_lazy_mmu_cpu is called in preemptible context
  x86/paravirt: make arch_flush_lazy_mmu/cpu disable preemption
  x86, pat: fix warn_on_once() while mapping 0-1MB range with /dev/mem
  x86/cpa: make sure cpa is safe to call in lazy mmu mode
  x86, ptrace, mm: fix double-free on race
parents 8ce9a75a be716615

arch/x86/include/asm/page.h

+0 −1
Original line number Diff line number Diff line
@@ -57,7 +57,6 @@ typedef struct { pgdval_t pgd; } pgd_t; 
typedef struct { pgprotval_t pgprot; } pgprot_t;



extern int page_is_ram(unsigned long pagenr);

extern int pagerange_is_ram(unsigned long start, unsigned long end);

extern int devmem_is_allowed(unsigned long pagenr);

extern void map_devmem(unsigned long pfn, unsigned long size,

		       pgprot_t vma_prot);

arch/x86/include/asm/paravirt.h

+2 −15
Original line number Diff line number Diff line
@@ -1352,14 +1352,7 @@ static inline void arch_leave_lazy_cpu_mode(void) 
	PVOP_VCALL0(pv_cpu_ops.lazy_mode.leave);

}



static inline void arch_flush_lazy_cpu_mode(void)

{

	if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU)) {

		arch_leave_lazy_cpu_mode();

		arch_enter_lazy_cpu_mode();

	}

}



void arch_flush_lazy_cpu_mode(void);



#define  __HAVE_ARCH_ENTER_LAZY_MMU_MODE

static inline void arch_enter_lazy_mmu_mode(void)
@@ -1372,13 +1365,7 @@ static inline void arch_leave_lazy_mmu_mode(void) 
	PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);

}



static inline void arch_flush_lazy_mmu_mode(void)

{

	if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU)) {

		arch_leave_lazy_mmu_mode();

		arch_enter_lazy_mmu_mode();

	}

}

void arch_flush_lazy_mmu_mode(void);



static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,

				unsigned long phys, pgprot_t flags)

arch/x86/kernel/hpet.c

+2 −0
Original line number Diff line number Diff line
@@ -269,6 +269,8 @@ static void hpet_set_mode(enum clock_event_mode mode, 
		now = hpet_readl(HPET_COUNTER);

		cmp = now + (unsigned long) delta;

		cfg = hpet_readl(HPET_Tn_CFG(timer));

		/* Make sure we use edge triggered interrupts */

		cfg &= ~HPET_TN_LEVEL;

		cfg |= HPET_TN_ENABLE | HPET_TN_PERIODIC |

		       HPET_TN_SETVAL | HPET_TN_32BIT;

		hpet_writel(cfg, HPET_Tn_CFG(timer));

arch/x86/kernel/olpc.c

+1 −1
Original line number Diff line number Diff line
@@ -203,7 +203,7 @@ static void __init platform_detect(void) 
static void __init platform_detect(void)

{

	/* stopgap until OFW support is added to the kernel */

	olpc_platform_info.boardrev = 0xc2;

	olpc_platform_info.boardrev = olpc_board(0xc2);

}

#endif

arch/x86/kernel/paravirt.c

+26 −0
Original line number Diff line number Diff line
@@ -268,6 +268,32 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void) 
	return __get_cpu_var(paravirt_lazy_mode);

}



void arch_flush_lazy_mmu_mode(void)

{

	preempt_disable();



	if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {

		WARN_ON(preempt_count() == 1);

		arch_leave_lazy_mmu_mode();

		arch_enter_lazy_mmu_mode();

	}



	preempt_enable();

}



void arch_flush_lazy_cpu_mode(void)

{

	preempt_disable();



	if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU) {

		WARN_ON(preempt_count() == 1);

		arch_leave_lazy_cpu_mode();

		arch_enter_lazy_cpu_mode();

	}



	preempt_enable();

}



struct pv_info pv_info = {

	.name = "bare hardware",

	.paravirt_enabled = 0,