diff options
| author | David S. Miller <davem@davemloft.net> | 2014-09-26 21:19:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-30 09:38:27 -0700 |
| commit | c964b0ba69092f8b340f445b2dc4db00f420b61b (patch) | |
| tree | ca40f1d60fb33f973a11bdc1ccabbe50cadace6b /arch/sparc/kernel | |
| parent | a2613388d68c4bbd8512dc3e3bbdf693106b06aa (diff) | |
sparc64: Switch to 4-level page tables.
[ Upstream commit ac55c768143aa34cc3789c4820cbb0809a76fd9c ]
This has become necessary with chips that support more than 43-bits
of physical addressing.
Based almost entirely upon a patch by Bob Picco.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Bob Picco <bob.picco@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/sparc/kernel')
| -rw-r--r-- | arch/sparc/kernel/smp_64.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c index 8311f3d64d26..50c3dd03be31 100644 --- a/arch/sparc/kernel/smp_64.c +++ b/arch/sparc/kernel/smp_64.c @@ -1479,6 +1479,13 @@ static void __init pcpu_populate_pte(unsigned long addr) pud_t *pud; pmd_t *pmd; + if (pgd_none(*pgd)) { + pud_t *new; + + new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + pgd_populate(&init_mm, pgd, new); + } + pud = pud_offset(pgd, addr); if (pud_none(*pud)) { pmd_t *new; |