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alpha: fix vmalloc breakage

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On alpha, we have to map some stuff in the VMALLOC space very early in the
boot process (to make SRM console callbacks work and so on, see
arch/alpha/mm/init.c).  For old VM allocator, we just manually placed a
vm_struct onto the global vmlist and this worked for ages.

Unfortunately, the new allocator isn't aware of this, so it constantly
tries to allocate the VM space which is already in use, making vmalloc on
alpha defunct.

This patch forces KVA to import vmlist entries on init.

[[email protected]: remove unneeded check (per Johannes)]
Signed-off-by: Ivan Kokshaysky <[email protected]>
Cc: Nick Piggin <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ivan Kokshaysky 2009-01-15 13:50:48 -08:00 • committed by Linus Torvalds
commit 822c18f2e3
1 changed files with 11 additions and 0 deletions
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11
mm/vmalloc.c
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@ -24,6 +24,7 @@
#include <linux/rbtree.h>
#include <linux/radix-tree.h>
#include <linux/rcupdate.h>
#include <linux/bootmem.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
@ -984,6 +985,8 @@ EXPORT_SYMBOL(vm_map_ram);
void __init vmalloc_init(void)
{
struct vmap_area *va;
struct vm_struct *tmp;
int i;
for_each_possible_cpu(i) {
@ -996,6 +999,14 @@ void __init vmalloc_init(void)
vbq->nr_dirty = 0;
}
/* Import existing vmlist entries. */
for (tmp = vmlist; tmp; tmp = tmp->next) {
va = alloc_bootmem(sizeof(struct vmap_area));
va->flags = tmp->flags | VM_VM_AREA;
va->va_start = (unsigned long)tmp->addr;
va->va_end = va->va_start + tmp->size;
__insert_vmap_area(va);
}
vmap_initialized = true;
}