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Commit 016f8cf0 authored by Kevin Hao's avatar Kevin Hao Committed by Scott Wood
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powerpc: book3e_64: fix the align size for paca_struct 



All the cache line size of the current book3e 64bit SoCs are 64 bytes.
So we should use this size to align the member of paca_struct.
This only change the paca_struct's members which are private to book3e
CPUs, and should not have any effect to book3s ones. With this, we save
192 bytes. Also change it to __aligned(size) since it is preferred over
__attribute__((aligned(size))).

Before:
	/* size: 1920, cachelines: 30, members: 46 */
	/* sum members: 1667, holes: 6, sum holes: 141 */
	/* padding: 112 */

After:
	/* size: 1728, cachelines: 27, members: 46 */
	/* sum members: 1667, holes: 4, sum holes: 13 */
	/* padding: 48 */

Signed-off-by: default avatarKevin Hao <haokexin@gmail.com>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent 2e51563d

arch/powerpc/include/asm/paca.h

+2 −2
Original line number Diff line number Diff line
@@ -106,9 +106,9 @@ struct paca_struct { 
#endif /* CONFIG_PPC_STD_MMU_64 */



#ifdef CONFIG_PPC_BOOK3E

	u64 exgen[8] __attribute__((aligned(0x80)));

	u64 exgen[8] __aligned(0x40);

	/* Keep pgd in the same cacheline as the start of extlb */

	pgd_t *pgd __attribute__((aligned(0x80))); /* Current PGD */

	pgd_t *pgd __aligned(0x40); /* Current PGD */

	pgd_t *kernel_pgd;		/* Kernel PGD */



	/* Shared by all threads of a core -- points to tcd of first thread */