[PATCH] drivers: optee: Fix compilation issue.

[Vincenzo Frascino]

The optee driver uses specific page table types to verify if a memory
region is normal. These types are not defined in nommu systems. Trying
to compile the driver in these systems results in a build error:

  linux/drivers/tee/optee/call.c: In function âis_normal_memoryâ:
  linux/drivers/tee/optee/call.c:533:26: error: âL_PTE_MT_MASKâ undeclared
     (first use in this function); did you mean âPREEMPT_MASKâ?
     return (pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEALLOC;
                             ^~~~~~~~~~~~~
                             PREEMPT_MASK
  linux/drivers/tee/optee/call.c:533:26: note: each undeclared identifier is
     reported only once for each function it appears in
  linux/drivers/tee/optee/call.c:533:44: error: âL_PTE_MT_WRITEALLOCâ undeclared
     (first use in this function)
     return (pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEALLOC;
                                            ^~~~~~~~~~~~~~~~~~~

Make the optee driver depend on MMU to fix the compilation issue.

Cc: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
---
 drivers/tee/optee/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tee/optee/Kconfig b/drivers/tee/optee/Kconfig
index d1ad512e1708..3ca71e3812ed 100644
--- a/drivers/tee/optee/Kconfig
+++ b/drivers/tee/optee/Kconfig
@@ -3,6 +3,7 @@
 config OPTEE
 	tristate "OP-TEE"
 	depends on HAVE_ARM_SMCCC
+	depends on MMU
 	help
 	  This implements the OP-TEE Trusted Execution Environment (TEE)
 	  driver.
-- 
2.24.1