diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/pgtable_64.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 1d443407423..ad6e135bf21 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -322,6 +322,8 @@ EXPORT_SYMBOL(__ioremap); EXPORT_SYMBOL(iounmap); EXPORT_SYMBOL(__iounmap); +static DEFINE_SPINLOCK(phb_io_lock); + void __iomem * reserve_phb_iospace(unsigned long size) { void __iomem *virt_addr; @@ -329,8 +331,10 @@ void __iomem * reserve_phb_iospace(unsigned long size) if (phbs_io_bot >= IMALLOC_BASE) panic("reserve_phb_iospace(): phb io space overflow\n"); + spin_lock(&phb_io_lock); virt_addr = (void __iomem *) phbs_io_bot; phbs_io_bot += size; + spin_unlock(&phb_io_lock); return virt_addr; } |