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powerpc: book3e_64: fix the align size for paca_struct

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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: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Kevin Hao 2015-03-10 20:41:31 +08:00 committed by Scott Wood
parent 2e51563d07
commit 016f8cf0d8
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/include/asm/paca.h
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@ -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 */