Commit 909ea964 authored by Committed by Tejun Heo
core: Replace __get_cpu_var with __this_cpu_read if not used for an address.
__get_cpu_var() can be replaced with this_cpu_read and will then use a single read instruction with implied address calculation to access the correct per cpu instance. However, the address of a per cpu variable passed to __this_cpu_read() cannot be determined (since it's an implied address conversion through segment prefixes). Therefore apply this only to uses of __get_cpu_var where the address of the variable is not used. Cc: Pekka Enberg <email@example.com> Cc: Hugh Dickins <firstname.lastname@example.org> Cc: Thomas Gleixner <email@example.com> Acked-by: H. Peter Anvin <firstname.lastname@example.org> Signed-off-by: Christoph Lameter <email@example.com> Signed-off-by: Tejun Heo <firstname.lastname@example.org>
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