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powerpc: Replace mem_init_done with slab_is_available()

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We have a powerpc specific global called mem_init_done which is "set on
boot once kmalloc can be called".

But that's not *quite* true. We set it at the bottom of mem_init(), and
rely on the fact that mm_init() calls kmem_cache_init() immediately
after that, and nothing is running in parallel.

So replace it with the generic and 100% correct slab_is_available().

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2015-03-30 14:10:37 +11:00
parent 4f9c53c8cc
commit f691fa1080
7 changed files with 10 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/powerpc/include/asm/setup.h
View File

@ -7,7 +7,6 @@
extern void ppc_printk_progress(char *s, unsigned short hex);
extern unsigned int rtas_data;
extern int mem_init_done; /* set on boot once kmalloc can be called */
extern unsigned long long memory_limit;
extern unsigned long klimit;
extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);

2
arch/powerpc/kernel/pci-common.c
View File

@ -76,7 +76,7 @@ struct pci_controller *pcibios_alloc_controller(struct device_node *dev)
list_add_tail(&phb->list_node, &hose_list);
spin_unlock(&hose_spinlock);
phb->dn = dev;
phb->is_dynamic = mem_init_done;
phb->is_dynamic = slab_is_available();
#ifdef CONFIG_PPC64
if (dev) {
int nid = of_node_to_nid(dev);

4
arch/powerpc/kernel/rtas.c
View File

@ -401,7 +401,7 @@ static char *__fetch_rtas_last_error(char *altbuf)
buf = altbuf;
} else {
buf = rtas_err_buf;
if (mem_init_done)
if (slab_is_available())
buf = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC);
}
if (buf)
@ -461,7 +461,7 @@ int rtas_call(int token, int nargs, int nret, int *outputs, ...)
if (buff_copy) {
log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0);
if (mem_init_done)
if (slab_is_available())
kfree(buff_copy);
}
return ret;

2
arch/powerpc/lib/alloc.c
View File

@ -10,7 +10,7 @@ void * __init_refok zalloc_maybe_bootmem(size_t size, gfp_t mask)
{
void *p;
if (mem_init_done)
if (slab_is_available())
p = kzalloc(size, mask);
else {
p = memblock_virt_alloc(size, 0);

3
arch/powerpc/mm/mem.c
View File

@ -61,7 +61,6 @@
#define CPU_FTR_NOEXECUTE 0
#endif
int mem_init_done;
unsigned long long memory_limit;
#ifdef CONFIG_HIGHMEM
@ -377,8 +376,6 @@ void __init mem_init(void)
pr_info(" * 0x%08lx..0x%08lx : vmalloc & ioremap\n",
VMALLOC_START, VMALLOC_END);
#endif /* CONFIG_PPC32 */
mem_init_done = 1;
}
void free_initmem(void)

9
arch/powerpc/mm/pgtable_32.c
View File

@ -107,9 +107,8 @@ void pgd_free(struct mm_struct *mm, pgd_t *pgd)
__init_refok pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
pte_t *pte;
extern int mem_init_done;
if (mem_init_done) {
if (slab_is_available()) {
pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
} else {
pte = __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE));
@ -216,7 +215,7 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
* Don't allow anybody to remap normal RAM that we're using.
* mem_init() sets high_memory so only do the check after that.
*/
if (mem_init_done && (p < virt_to_phys(high_memory)) &&
if (slab_is_available() && (p < virt_to_phys(high_memory)) &&
!(__allow_ioremap_reserved && memblock_is_region_reserved(p, size))) {
printk("__ioremap(): phys addr 0x%llx is RAM lr %ps\n",
(unsigned long long)p, __builtin_return_address(0));
@ -244,7 +243,7 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
if ((v = p_mapped_by_tlbcam(p)))
goto out;
if (mem_init_done) {
if (slab_is_available()) {
struct vm_struct *area;
area = get_vm_area_caller(size, VM_IOREMAP, caller);
if (area == 0)
@ -263,7 +262,7 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
for (i = 0; i < size && err == 0; i += PAGE_SIZE)
err = map_page(v+i, p+i, flags);
if (err) {
if (mem_init_done)
if (slab_is_available())
vunmap((void *)v);
return NULL;
}

4
arch/powerpc/mm/pgtable_64.c
View File

@ -231,7 +231,7 @@ void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
if ((size == 0) || (paligned == 0))
return NULL;
if (mem_init_done) {
if (slab_is_available()) {
struct vm_struct *area;
area = __get_vm_area_caller(size, VM_IOREMAP,
@ -315,7 +315,7 @@ void __iounmap(volatile void __iomem *token)
{
void *addr;
if (!mem_init_done)
if (!slab_is_available())
return;
addr = (void *) ((unsigned long __force)