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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2019-05-28 09:36:19 -0400
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-05-28 09:36:19 -0400
commit86b3de60a0b634cdcef82d0a2091bc5444a00020 (patch)
tree2c9adf9f4171cc33baeb7ebc6200bc5b3cbafd73 /arch/Kconfig
parenta124692b698b00026a58d89831ceda2331b2e1d0 (diff)
ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS
Commit c19fa94a8fed ("Add HAVE_64BIT_ALIGNED_ACCESS") added the config for architectures that required 64bit aligned access for all 64bit words. As the ftrace ring buffer stores data on 4 byte alignment, this config option was used to force it to store data on 8 byte alignment to make sure the data being stored and written directly into the ring buffer was 8 byte aligned as it would cause issues trying to write an 8 byte word on a 4 not 8 byte aligned memory location. But with the removal of the metag architecture, which was the only architecture to use this, there is no architecture supported by Linux that requires 8 byte aligne access for all 8 byte words (4 byte alignment is good enough). Removing this config can simplify the code a bit. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig16
1 files changed, 0 insertions, 16 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index c47b328eada0..665a7557b15c 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -128,22 +128,6 @@ config UPROBES
managed by the kernel and kept transparent to the probed
application. )
-config HAVE_64BIT_ALIGNED_ACCESS
- def_bool 64BIT && !HAVE_EFFICIENT_UNALIGNED_ACCESS
- help
- Some architectures require 64 bit accesses to be 64 bit
- aligned, which also requires structs containing 64 bit values
- to be 64 bit aligned too. This includes some 32 bit
- architectures which can do 64 bit accesses, as well as 64 bit
- architectures without unaligned access.
-
- This symbol should be selected by an architecture if 64 bit
- accesses are required to be 64 bit aligned in this way even
- though it is not a 64 bit architecture.
-
- See Documentation/unaligned-memory-access.txt for more
- information on the topic of unaligned memory accesses.
-
config HAVE_EFFICIENT_UNALIGNED_ACCESS
bool
help