Messages in this thread | | | Date | Tue, 24 May 2016 01:08:39 -0500 | From | Segher Boessenkool <> | Subject | Re: [PATCH] powerpc: inline current_stack_pointer() |
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On Tue, May 24, 2016 at 07:39:59AM +0200, Christophe Leroy wrote: > >>+static inline unsigned long current_stack_pointer(void) > >>+{ > >>+ register unsigned long *ptr asm("r1"); > >>+ > >>+ return *ptr; > >>+} > >Register asm is only guaranteed to work as input to inline asm. NAK. > > > Does it mean that the following declaration in > arch/powerpc/include/asm/paca.h is wrong too ? > > register struct paca_struct *local_paca asm("r13");
That one is fine, because it is a global var.
https://gcc.gnu.org/onlinedocs/gcc/Explicit-Register-Variables.html
Segher
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