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powerpc/64: Implement and use soft_enabled_set_return API 

Add a new wrapper function, soft_enabled_set_return(), added to do the
paca->soft_enabled updates requiring a set-return.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Madhavan Srinivasan 2017-12-20 09:25:47 +05:30 committed by Michael Ellerman
parent e0b5687bed
commit a67c543aac
1 changed files with 15 additions and 10 deletions
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25
arch/powerpc/include/asm/hw_irq.h
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@ -76,6 +76,20 @@ static inline notrace void soft_enabled_set(unsigned long enable)
: "memory");
}
static inline notrace unsigned long soft_enabled_set_return(unsigned long enable)
{
unsigned long flags;
asm volatile(
"lbz %0,%1(13); stb %2,%1(13)"
: "=&r" (flags)
: "i" (offsetof(struct paca_struct, soft_enabled)),
"r" (enable)
: "memory");
return flags;
}
static inline unsigned long arch_local_save_flags(void)
{
return soft_enabled_return();
@ -95,16 +109,7 @@ static inline void arch_local_irq_enable(void)
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags;
asm volatile(
"lbz %0,%1(13); stb %2,%1(13)"
: "=&r" (flags)
: "i" (offsetof(struct paca_struct, soft_enabled)),
"r" (IRQS_DISABLED)
: "memory");
return flags;
return soft_enabled_set_return(IRQS_DISABLED);
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)