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authorMichael Ellerman <mpe@ellerman.id.au>2020-02-20 22:51:37 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2020-03-04 22:44:28 +1100
commit3d13e839e801e081bdece0127c2affa33d0f77cf (patch)
tree89654d957af79c8d11e42fb531afa943b1f8e0e5 /arch/powerpc/include/asm/reg.h
parent22697da36d0cee57c2a5750ef7d84e4d88da17e7 (diff)
powerpc: Rename current_stack_pointer() to current_stack_frame()
current_stack_pointer(), which was called __get_SP(), used to just return the value in r1. But that caused problems in some cases, so it was turned into a function in commit bfe9a2cfe91a ("powerpc: Reimplement __get_SP() as a function not a define"). Because it's a function in a separate compilation unit to all its callers, it has the effect of causing a stack frame to be created, and then returns the address of that frame. This is good in some cases like those described in the above commit, but in other cases it's overkill, we just need to know what stack page we're on. On some other arches current_stack_pointer is just a register global giving the stack pointer, and we'd like to do that too. So rename our current_stack_pointer() to current_stack_frame() to make that possible. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr> Link: https://lore.kernel.org/r/20200220115141.2707-1-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/include/asm/reg.h')
-rw-r--r--arch/powerpc/include/asm/reg.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 1aa46dff0957..1b1ffdba6097 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1448,7 +1448,7 @@ static inline void mtsrin(u32 val, u32 idx)
#define proc_trap() asm volatile("trap")
-extern unsigned long current_stack_pointer(void);
+extern unsigned long current_stack_frame(void);
extern unsigned long scom970_read(unsigned int address);
extern void scom970_write(unsigned int address, unsigned long value);