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Commit bf83e614 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

Pull powerpc fixes from Ben Herrenschmidt:
 "Here are a handful of small powerpc fixes.

  A couple of section mismatches (always worth fixing), a missing export
  of a new symbol causing build failures of modules, a page fault
  deadlock fix (interestingly that bug has been around for a LONG time,
  though it seems to be more easily triggered by KVM) and fixing pseries
  default idle loop in the absence of the cpuidle drivers (such as
  during boot)"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Default arch idle could cede processor on pseries
  fbdev/ps3fb: Fix section mismatch warning for ps3fb_probe
  powerpc: Fix section mismatch warning for prom_rtas_call
  powerpc: Fix possible deadlock on page fault
  powerpc: Export cpu_to_chip_id() to fix build error
parents a60d4b98 363edbe2

arch/powerpc/kernel/prom_init.c

+2 −1
Original line number Diff line number Diff line
@@ -1297,7 +1297,8 @@ static void __init prom_query_opal(void) 
		prom_opal_align = 0x10000;

}



static int prom_rtas_call(int token, int nargs, int nret, int *outputs, ...)

static int __init prom_rtas_call(int token, int nargs, int nret,

				 int *outputs, ...)

{

	struct rtas_args rtas_args;

	va_list list;

arch/powerpc/kernel/smp.c

+1 −0
Original line number Diff line number Diff line
@@ -611,6 +611,7 @@ int cpu_to_chip_id(int cpu) 
	of_node_put(np);

	return of_get_ibm_chip_id(np);

}

EXPORT_SYMBOL(cpu_to_chip_id);



/* Helper routines for cpu to core mapping */

int cpu_core_index_of_thread(int cpu)

arch/powerpc/mm/fault.c

+10 −3
Original line number Diff line number Diff line
@@ -206,7 +206,7 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address, 
	int trap = TRAP(regs);

 	int is_exec = trap == 0x400;

	int fault;

	int rc = 0;

	int rc = 0, store_update_sp = 0;



#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))

	/*
@@ -280,6 +280,14 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address, 


	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);



	/*

	 * We want to do this outside mmap_sem, because reading code around nip

	 * can result in fault, which will cause a deadlock when called with

	 * mmap_sem held

	 */

	if (user_mode(regs))

		store_update_sp = store_updates_sp(regs);



	/* When running in the kernel we expect faults to occur only to

	 * addresses in user space.  All other faults represent errors in the

	 * kernel and should generate an OOPS.  Unfortunately, in the case of an
@@ -345,8 +353,7 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address, 
		 * between the last mapped region and the stack will

		 * expand the stack rather than segfaulting.

		 */

		if (address + 2048 < uregs->gpr[1]

		    && (!user_mode(regs) || !store_updates_sp(regs)))

		if (address + 2048 < uregs->gpr[1] && !store_update_sp)

			goto bad_area;

	}

	if (expand_stack(vma, address))

arch/powerpc/platforms/pseries/setup.c

+21 −10
Original line number Diff line number Diff line
@@ -354,7 +354,7 @@ static int alloc_dispatch_log_kmem_cache(void) 
}

early_initcall(alloc_dispatch_log_kmem_cache);



static void pSeries_idle(void)

static void pseries_lpar_idle(void)

{

	/* This would call on the cpuidle framework, and the back-end pseries

	 * driver to  go to idle states
@@ -362,10 +362,22 @@ static void pSeries_idle(void) 
	if (cpuidle_idle_call()) {

		/* On error, execute default handler

		 * to go into low thread priority and possibly

		 * low power mode.

		 * low power mode by cedeing processor to hypervisor

		 */

		HMT_low();

		HMT_very_low();



		/* Indicate to hypervisor that we are idle. */

		get_lppaca()->idle = 1;



		/*

		 * Yield the processor to the hypervisor.  We return if

		 * an external interrupt occurs (which are driven prior

		 * to returning here) or if a prod occurs from another

		 * processor. When returning here, external interrupts

		 * are enabled.

		 */

		cede_processor();



		get_lppaca()->idle = 0;

	}

}
@@ -456,15 +468,14 @@ static void __init pSeries_setup_arch(void) 


	pSeries_nvram_init();



	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {

	if (firmware_has_feature(FW_FEATURE_LPAR)) {

		vpa_init(boot_cpuid);

		ppc_md.power_save = pSeries_idle;

	}



	if (firmware_has_feature(FW_FEATURE_LPAR))

		ppc_md.power_save = pseries_lpar_idle;

		ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;

	else

	} else {

		/* No special idle routine */

		ppc_md.enable_pmcs = power4_enable_pmcs;

	}



	ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;

drivers/video/ps3fb.c

+1 −1
Original line number Diff line number Diff line
@@ -952,7 +952,7 @@ static struct fb_ops ps3fb_ops = { 
	.fb_compat_ioctl = ps3fb_ioctl

};



static struct fb_fix_screeninfo ps3fb_fix __initdata = {

static struct fb_fix_screeninfo ps3fb_fix = {

	.id =		DEVICE_NAME,

	.type =		FB_TYPE_PACKED_PIXELS,

	.visual =	FB_VISUAL_TRUECOLOR,