[SPARC64]: Solidify check in cheetah_check_main_memory().

Need to make sure the address is below high_memory before
passing it to kern_addr_valid().

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index eeb1e835c423..7f190fc57545 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -1333,6 +1333,9 @@ static int cheetah_check_main_memory(unsigned long paddr)
 {
         unsigned long vaddr = PAGE_OFFSET + paddr;
 
+        if (vaddr > high_memory)
+                return 0;
+
         return kern_addr_valid(vaddr);
 }