Merge branch 'linux-linaro-lsk' into linux-linaro-lsk-android

[firefly-linux-kernel-4.4.55.git] / arch / arm / Kconfig.debug

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 5fdb6dbc5f899ea41a857e69b32eaf30ddd32005..4d1793474c9cc2975284a223a243ba594259cbf4 100644 (file)
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -63,6 +63,27 @@ config DEBUG_USER
              8 - SIGSEGV faults
             16 - SIGBUS faults
 
+config DEBUG_RODATA
+       bool "Write protect kernel text section"
+       default n
+       depends on DEBUG_KERNEL && MMU
+       ---help---
+         Mark the kernel text section as write-protected in the pagetables,
+         in order to catch accidental (and incorrect) writes to such const
+         data. This will cause the size of the kernel, plus up to 4MB, to
+         be mapped as pages instead of sections, which will increase TLB
+         pressure.
+         If in doubt, say "N".
+
+config DEBUG_RODATA_TEST
+       bool "Testcase for the DEBUG_RODATA feature"
+       depends on DEBUG_RODATA
+       default n
+       ---help---
+         This option enables a testcase for the DEBUG_RODATA
+         feature.
+         If in doubt, say "N"
+
 # These options are only for real kernel hackers who want to get their hands dirty.
 config DEBUG_LL
        bool "Kernel low-level debugging functions (read help!)"