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Diffstat (limited to 'arch/mips/mm/ioremap.c')
| -rw-r--r-- | arch/mips/mm/ioremap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/mm/ioremap.c b/arch/mips/mm/ioremap.c index b6dad2fd55..d8243d61ef 100644 --- a/arch/mips/mm/ioremap.c +++ b/arch/mips/mm/ioremap.c @@ -72,6 +72,10 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, unsigned long size, flags == _CACHE_UNCACHED) return (void __iomem *) CKSEG1ADDR(phys_addr); + /* Early remaps should use the unmapped regions til' VM is available */ + if (WARN_ON_ONCE(!slab_is_available())) + return NULL; + /* * Don't allow anybody to remap RAM that may be allocated by the page * allocator, since that could lead to races & data clobbering. |