]> git.proxmox.com Git - mirror_ubuntu-disco-kernel.git/commit
trace/ring_buffer: handle 64bit aligned structs
authorJames Hogan <james.hogan@imgtec.com>
Wed, 30 May 2012 11:11:19 +0000 (12:11 +0100)
committerJames Hogan <james.hogan@imgtec.com>
Sat, 2 Mar 2013 20:09:16 +0000 (20:09 +0000)
commit649508f684751122aa302ab10f0f06cb4a88415b
treec8e4852f2470f6068880d4509d2d3a510104c9c6
parentc19fa94a8fed72754e81800dfa14af6daaf6d331
trace/ring_buffer: handle 64bit aligned structs

Some 32 bit architectures require 64 bit values to be aligned (for
example Meta which has 64 bit read/write instructions). These require 8
byte alignment of event data too, so use
!CONFIG_HAVE_64BIT_ALIGNED_ACCESS instead of !CONFIG_64BIT ||
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS to decide alignment, and align
buffer_data_page::data accordingly.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org> (previous version subtly different)
kernel/trace/ring_buffer.c