Commit 67060d9c authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[S390] Fix section mismatch warnings. 



This fixes the last remaining section mismatch warnings in s390
architecture code. It reveals also a real bug introduced by... me
with git commit 2069e978
("[S390] sparsemem vmemmap: initialize memmap.")

Calling the generic vmemmap_alloc_block() function to get initialized
memory is a nice idea, however that function is __meminit annotated
and therefore the function might be gone if we try to call it later.
This can happen if a DCSS segment gets added.

So basically revert the patch and clear the memmap explicitly to fix
the original bug.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent bebd9a45

arch/s390/kernel/smp.c

+1 −1
Original line number Diff line number Diff line
@@ -1089,7 +1089,7 @@ out: 


#ifdef CONFIG_HOTPLUG_CPU



int smp_rescan_cpus(void)

int __ref smp_rescan_cpus(void)

{

	cpumask_t newcpus;

	int cpu;

arch/s390/mm/vmem.c

+13 −5
Original line number Diff line number Diff line
@@ -27,12 +27,19 @@ struct memory_segment { 


static LIST_HEAD(mem_segs);



static pud_t *vmem_pud_alloc(void)

static void __ref *vmem_alloc_pages(unsigned int order)

{

	if (slab_is_available())

		return (void *)__get_free_pages(GFP_KERNEL, order);

	return alloc_bootmem_pages((1 << order) * PAGE_SIZE);

}



static inline pud_t *vmem_pud_alloc(void)

{

	pud_t *pud = NULL;



#ifdef CONFIG_64BIT

	pud = vmemmap_alloc_block(PAGE_SIZE * 4, 0);

	pud = vmem_alloc_pages(2);

	if (!pud)

		return NULL;

	clear_table((unsigned long *) pud, _REGION3_ENTRY_EMPTY, PAGE_SIZE * 4);
@@ -40,12 +47,12 @@ static pud_t *vmem_pud_alloc(void) 
	return pud;

}



static pmd_t *vmem_pmd_alloc(void)

static inline pmd_t *vmem_pmd_alloc(void)

{

	pmd_t *pmd = NULL;



#ifdef CONFIG_64BIT

	pmd = vmemmap_alloc_block(PAGE_SIZE * 4, 0);

	pmd = vmem_alloc_pages(2);

	if (!pmd)

		return NULL;

	clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE * 4);
@@ -207,13 +214,14 @@ int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node) 
		if (pte_none(*pt_dir)) {

			unsigned long new_page;



			new_page =__pa(vmemmap_alloc_block(PAGE_SIZE, 0));

			new_page =__pa(vmem_alloc_pages(0));

			if (!new_page)

				goto out;

			pte = pfn_pte(new_page >> PAGE_SHIFT, PAGE_KERNEL);

			*pt_dir = pte;

		}

	}

	memset(start, 0, nr * sizeof(struct page));

	ret = 0;

out:

	flush_tlb_kernel_range(start_addr, end_addr);

drivers/s390/char/sclp_config.c

+1 −1
Original line number Diff line number Diff line
@@ -40,7 +40,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work) 
	put_online_cpus();

}



static void sclp_cpu_change_notify(struct work_struct *work)

static void __ref sclp_cpu_change_notify(struct work_struct *work)

{

	smp_rescan_cpus();

}

CRA Git | Maintained and supported by SUSTech CRA and CCSE