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Subject[RFC PATCH 08/11] powerpc: Add and use LPPACA_SIZE constant
Date
Helps document what the hard-coded number means.

Suggested-by: Alexey Kardashevskiy <aik@linux.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
arch/powerpc/kernel/paca.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 0ee3e6d50f28..1edf8695019d 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -24,6 +24,8 @@
#define boot_cpuid 0
#endif

+#define LPPACA_SIZE 0x400
+
static void *__init alloc_paca_data(unsigned long size, unsigned long align,
unsigned long limit, int cpu)
{
@@ -70,7 +72,7 @@ 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,
@@ -80,14 +82,13 @@ 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(LPPACA_SIZE < sizeof(struct lppaca));

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;
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