Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/bcm2385', 'spi/topic...

[sfrench/cifs-2.6.git] / arch / arm64 / include / asm / proc-fns.h

diff --git a/arch/arm64/include/asm/proc-fns.h b/arch/arm64/include/asm/proc-fns.h
index 9a8fd84f8fb2b67fe4bc2d845e7f6b584cbf0799..941c375616e2072d3b9fbf6442426c3491f00c01 100644 (file)
--- a/arch/arm64/include/asm/proc-fns.h
+++ b/arch/arm64/include/asm/proc-fns.h
@@ -39,7 +39,11 @@ extern u64 cpu_do_resume(phys_addr_t ptr, u64 idmap_ttbr);
 
 #include <asm/memory.h>
 
-#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
+#define cpu_switch_mm(pgd,mm)                          \
+do {                                                   \
+       BUG_ON(pgd == swapper_pg_dir);                  \
+       cpu_do_switch_mm(virt_to_phys(pgd),mm);         \
+} while (0)
 
 #define cpu_get_pgd()                                  \
 ({                                                     \