[PATCH v3 05/10] arch: Introduce CONFIG_COMPAT_32BIT_TIME

Deepa Dinamani
2018-01-16T02:20:22Z

Compat functions are now used to support 32 bit time_t in
compat mode on 64 bit architectures and in native mode on
32 bit architectures.

Introduce COMPAT_32BIT_TIME to conditionally compile these
functions.

Note that turning off 32 bit time_t support requires more
changes on architecture side. For instance, architecure
syscall tables need to be updated to drop support for 32 bit
time_t syscalls.

Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
---
arch/Kconfig | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arch/Kconfig b/arch/Kconfig
index 183f6293d596..cb2f68d04def 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -884,6 +884,13 @@ config 64BIT_TIME
architectures, and 64-bit architectures as part of compat syscall
handling.

+config COMPAT_32BIT_TIME
+ def_bool (!64BIT && 64BIT_TIME) || COMPAT
+ help
+ This enables 32 bit time_t support in addition to 64 bit time_t support.
+ This is relevant on all 32-bit architectures, and 64-bit architectures
+ as part of compat syscall handling.
+
config ARCH_NO_COHERENT_DMA_MMAP
bool

--
2.14.1