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time: Introduce CONFIG_COMPAT_32BIT_TIME

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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>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Deepa Dinamani 2018-03-13 21:03:28 -07:00 committed by Arnd Bergmann
parent d4703ddafd
commit 17435e5f8c
1 changed files with 7 additions and 0 deletions
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7
arch/Kconfig
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@ -878,6 +878,13 @@ 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