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authorDaniel Borkmann <daniel@iogearbox.net>2017-02-21 18:09:33 +0300
committerDavid S. Miller <davem@davemloft.net>2017-02-21 21:30:13 +0300
commitd2852a2240509e512712e25de2d0796cda435ecb (patch)
tree1a7b8c0311150eb57ab62857001f1895560200c8 /arch/Kconfig
parent559c59b238ebb7d39b732b6b08a59693b972e75c (diff)
downloadlinux-d2852a2240509e512712e25de2d0796cda435ecb.tar.xz
arch: add ARCH_HAS_SET_MEMORY config
Currently, there's no good way to test for the presence of set_memory_ro/rw/x/nx() helpers implemented by archs such as x86, arm, arm64 and s390. There's DEBUG_SET_MODULE_RONX and DEBUG_RODATA, however both don't really reflect that: set_memory_*() are also available even when DEBUG_SET_MODULE_RONX is turned off, and DEBUG_RODATA is set by parisc, but doesn't implement above functions. Thus, add ARCH_HAS_SET_MEMORY that is selected by mentioned archs, where generic code can test against this. This also allows later on to move DEBUG_SET_MODULE_RONX out of the arch specific Kconfig to define it only once depending on ARCH_HAS_SET_MEMORY. Suggested-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index bd04eace455c..e8ada79ec71f 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -222,6 +222,10 @@ config GENERIC_SMP_IDLE_THREAD
config GENERIC_IDLE_POLL_SETUP
bool
+# Select if arch has all set_memory_ro/rw/x/nx() functions in asm/cacheflush.h
+config ARCH_HAS_SET_MEMORY
+ bool
+
# Select if arch init_task initializer is different to init/init_task.c
config ARCH_INIT_TASK
bool