From: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> Date: Fri, 21 Jan 2011 15:36:33 -0500 > commit 7e066fb870fcd1025ec3ba7bbde5d541094f4ce1 added the aligned(32) type and > variable attribute to the tracepoint structures to deal with gcc happily > aligning statically defined structures on 32-byte multiples. > > Working on issues within Ftrace, we came up with __64_aligned, which deals with > this issue more elegantly by forcing an 8-byte alignment to both the type > declaration and variable definition. > > This therefore saves space, bringing down the size of struct tracepoint from 64 > bytes to 38 on 64-bit architectures. > > Updating: > - The type attribute (for iteration over the struct tracepoint array) > - Added the variable attribute to the extern definition (needed to force gcc to > consider this alignment for the following definition) > - The definition variable attribute (to force gcc to this specific alignment for > the static definitions) > - The linker script (8-byte alignment can now replace the previous 32-byte > alignment for the custom tracepoint section) > > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
