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powerpc/pseries: Add and use LPPACA_SIZE constant 

Helps document what the hard-coded number means.

Also take the opportunity to fix an #endif comment.

Suggested-by: Alexey Kardashevskiy <aik@linux.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190820021326.6884-8-bauerman@linux.ibm.com
This commit is contained in:
Thiago Jung Bauermann 2019-08-19 23:13:17 -03:00 committed by Michael Ellerman
parent 7f70c3815a
commit e311a92da1
1 changed files with 6 additions and 5 deletions
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11
arch/powerpc/kernel/paca.c
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@ -52,6 +52,8 @@ static void *__init alloc_paca_data(unsigned long size, unsigned long align,
#ifdef CONFIG_PPC_PSERIES
#define LPPACA_SIZE 0x400
/*
* See asm/lppaca.h for more detail.
*
@ -65,7 +67,7 @@ static inline void init_lppaca(struct lppaca *lppaca)
*lppaca = (struct lppaca) {
.desc = cpu_to_be32(0xd397d781), /* "LpPa" */
.size = cpu_to_be16(0x400),
.size = cpu_to_be16(LPPACA_SIZE),
.fpregs_in_use = 1,
.slb_count = cpu_to_be16(64),
.vmxregs_in_use = 0,
@ -75,19 +77,18 @@ static inline void init_lppaca(struct lppaca *lppaca)
static struct lppaca * __init new_lppaca(int cpu, unsigned long limit)
{
struct lppaca *lp;
size_t size = 0x400;
BUILD_BUG_ON(size < sizeof(struct lppaca));
BUILD_BUG_ON(sizeof(struct lppaca) > LPPACA_SIZE);
if (early_cpu_has_feature(CPU_FTR_HVMODE))
return NULL;
lp = alloc_paca_data(size, 0x400, limit, cpu);
lp = alloc_paca_data(LPPACA_SIZE, 0x400, limit, cpu);
init_lppaca(lp);
return lp;
}
#endif /* CONFIG_PPC_BOOK3S */
#endif /* CONFIG_PPC_PSERIES */
#ifdef CONFIG_PPC_BOOK3S_64