ARM: 8332/1: add CONFIG_VDSO Kconfig and Makefile bits

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

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index c43c714555661337048b72a5a21a6b5357659567..8a5f1e644104922ad427e7abb33c63144baf9174 100644 (file)
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -825,6 +825,20 @@ config KUSER_HELPERS
          Say N here only if you are absolutely certain that you do not
          need these helpers; otherwise, the safe option is to say Y.
 
+config VDSO
+       bool "Enable VDSO for acceleration of some system calls"
+       depends on AEABI && MMU
+       default y if ARM_ARCH_TIMER
+       select GENERIC_TIME_VSYSCALL
+       help
+         Place in the process address space an ELF shared object
+         providing fast implementations of gettimeofday and
+         clock_gettime.  Systems that implement the ARM architected
+         timer will receive maximum benefit.
+
+         You must have glibc 2.22 or later for programs to seamlessly
+         take advantage of this.
+
 config DMA_CACHE_RWFO
        bool "Enable read/write for ownership DMA cache maintenance"
        depends on CPU_V6K && SMP
@@ -892,13 +906,6 @@ config CACHE_L2X0
 
 if CACHE_L2X0
 
-config CACHE_PL310
-       bool
-       default y if CPU_V7 && !(CPU_V6 || CPU_V6K)
-       help
-         This option enables optimisations for the PL310 cache
-         controller.
-
 config PL310_ERRATA_588369
        bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
        help