Commit 286e050b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 fixes from Martin Schwidefsky:
 "Recent bug fixes, one of them touches a common code file.

  It adds two #ifndef/#endif pairs to asm-generic/io.h to be able to
  override xlate_dev_kmem_ptr and xlate_dev_mem_ptr."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pgtable: Fix gmap notifier address
  s390/dasd: fix handling of gone paths
  s390/pgtable: Fix check for pgste/storage key handling
  arch: s390: appldata: using strncpy() and strnlen() instead of sprintf()
  s390/smp: lost IPIs on cpu hotplug
  kernel: Fix s390 absolute memory access for /dev/mem
  s390/dma: do not call debug_dma after free
parents 7d80fea4 e86cbd87

arch/s390/appldata/appldata_base.c

+5 −2
Original line number Diff line number Diff line
@@ -212,7 +212,9 @@ appldata_timer_handler(ctl_table *ctl, int write, 
		return 0;

	}

	if (!write) {

		len = sprintf(buf, appldata_timer_active ? "1\n" : "0\n");

		strncpy(buf, appldata_timer_active ? "1\n" : "0\n",

			ARRAY_SIZE(buf));

		len = strnlen(buf, ARRAY_SIZE(buf));

		if (len > *lenp)

			len = *lenp;

		if (copy_to_user(buffer, buf, len))
@@ -317,7 +319,8 @@ appldata_generic_handler(ctl_table *ctl, int write, 
		return 0;

	}

	if (!write) {

		len = sprintf(buf, ops->active ? "1\n" : "0\n");

		strncpy(buf, ops->active ? "1\n" : "0\n", ARRAY_SIZE(buf));

		len = strnlen(buf, ARRAY_SIZE(buf));

		if (len > *lenp)

			len = *lenp;

		if (copy_to_user(buffer, buf, len)) {

arch/s390/include/asm/dma-mapping.h

+1 −1
Original line number Diff line number Diff line
@@ -71,8 +71,8 @@ static inline void dma_free_coherent(struct device *dev, size_t size, 
{

	struct dma_map_ops *dma_ops = get_dma_ops(dev);



	dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);

	debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);

	dma_ops->free(dev, size, cpu_addr, dma_handle, NULL);

}



#endif /* _ASM_S390_DMA_MAPPING_H */

arch/s390/include/asm/io.h

+1 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ static inline void * phys_to_virt(unsigned long address) 
}



void *xlate_dev_mem_ptr(unsigned long phys);

#define xlate_dev_mem_ptr xlate_dev_mem_ptr

void unxlate_dev_mem_ptr(unsigned long phys, void *addr);



/*

arch/s390/include/asm/pgtable.h

+11 −4
Original line number Diff line number Diff line
@@ -646,7 +646,7 @@ static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste) 
	unsigned long address, bits;

	unsigned char skey;



	if (!pte_present(*ptep))

	if (pte_val(*ptep) & _PAGE_INVALID)

		return pgste;

	address = pte_val(*ptep) & PAGE_MASK;

	skey = page_get_storage_key(address);
@@ -680,7 +680,7 @@ static inline pgste_t pgste_update_young(pte_t *ptep, pgste_t pgste) 
#ifdef CONFIG_PGSTE

	int young;



	if (!pte_present(*ptep))

	if (pte_val(*ptep) & _PAGE_INVALID)

		return pgste;

	/* Get referenced bit from storage key */

	young = page_reset_referenced(pte_val(*ptep) & PAGE_MASK);
@@ -706,7 +706,7 @@ static inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry) 
	unsigned long address;

	unsigned long okey, nkey;



	if (!pte_present(entry))

	if (pte_val(entry) & _PAGE_INVALID)

		return;

	address = pte_val(entry) & PAGE_MASK;

	okey = nkey = page_get_storage_key(address);
@@ -1098,6 +1098,9 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm, 
	pte = *ptep;

	if (!mm_exclusive(mm))

		__ptep_ipte(address, ptep);



	if (mm_has_pgste(mm))

		pgste = pgste_update_all(&pte, pgste);

	return pte;

}
@@ -1105,9 +1108,13 @@ static inline void ptep_modify_prot_commit(struct mm_struct *mm, 
					   unsigned long address,

					   pte_t *ptep, pte_t pte)

{

	pgste_t pgste;



	if (mm_has_pgste(mm)) {

		pgste = *(pgste_t *)(ptep + PTRS_PER_PTE);

		pgste_set_key(ptep, pgste, pte);

		pgste_set_pte(ptep, pte);

		pgste_set_unlock(ptep, *(pgste_t *)(ptep + PTRS_PER_PTE));

		pgste_set_unlock(ptep, pgste);

	} else

		*ptep = pte;

}

arch/s390/kernel/smp.c

+11 −16
Original line number Diff line number Diff line
@@ -428,34 +428,27 @@ void smp_stop_cpu(void) 
 * This is the main routine where commands issued by other

 * cpus are handled.

 */

static void do_ext_call_interrupt(struct ext_code ext_code,

				  unsigned int param32, unsigned long param64)

static void smp_handle_ext_call(void)

{

	unsigned long bits;

	int cpu;



	cpu = smp_processor_id();

	if (ext_code.code == 0x1202)

		inc_irq_stat(IRQEXT_EXC);

	else

		inc_irq_stat(IRQEXT_EMS);

	/*

	 * handle bit signal external calls

	 */

	bits = xchg(&pcpu_devices[cpu].ec_mask, 0);



	/* handle bit signal external calls */

	bits = xchg(&pcpu_devices[smp_processor_id()].ec_mask, 0);

	if (test_bit(ec_stop_cpu, &bits))

		smp_stop_cpu();



	if (test_bit(ec_schedule, &bits))

		scheduler_ipi();



	if (test_bit(ec_call_function, &bits))

		generic_smp_call_function_interrupt();



	if (test_bit(ec_call_function_single, &bits))

		generic_smp_call_function_single_interrupt();

}



static void do_ext_call_interrupt(struct ext_code ext_code,

				  unsigned int param32, unsigned long param64)

{

	inc_irq_stat(ext_code.code == 0x1202 ? IRQEXT_EXC : IRQEXT_EMS);

	smp_handle_ext_call();

}



void arch_send_call_function_ipi_mask(const struct cpumask *mask)
@@ -760,6 +753,8 @@ int __cpu_disable(void) 
{

	unsigned long cregs[16];



	/* Handle possible pending IPIs */

	smp_handle_ext_call();

	set_cpu_online(smp_processor_id(), false);

	/* Disable pseudo page faults on this cpu. */

	pfault_fini();

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