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Commit d0959024 authored by Richard Kennedy's avatar Richard Kennedy Committed by Thomas Gleixner
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timer_list: Remove alignment padding on 64 bit when CONFIG_TIMER_STATS 



Reorder struct timer_list to remove 8 bytes of alignment padding on 64
bit builds when CONFIG_TIMER_STATS is selected.

timer_list is widely used across the kernel so many structures will
benefit and shrink in size.

For example, with my config on x86_64
	per_cpu_dm_data shrinks from 136 to 128 bytes
and
	ahci_port_priv shrinks from 1032 to 968 bytes.

Signed-off-by: default avatarRichard Kennedy <richard@rsk.demon.co.uk>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent a386b5af

include/linux/timer.h

+1 −1
Original line number Diff line number Diff line
@@ -24,9 +24,9 @@ struct timer_list { 
	int slack;



#ifdef CONFIG_TIMER_STATS

	int start_pid;

	void *start_site;

	char start_comm[16];

	int start_pid;

#endif

#ifdef CONFIG_LOCKDEP

	struct lockdep_map lockdep_map;