[PATCH v3 3/5] alpha: use user_stack_pointer() in KSTK_ESP() and dump_elf_thread()

[Matt Turner <mattst88@gmail.com>]

Both open-code the same PCB lookup.

Assisted-by: Claude:claude-opus-5-5
Tested-by: Magnus Lindholm <linmag7@gmail.com>
Reviewed-by: Magnus Lindholm <linmag7@gmail.com>
Acked-by: Ian Rogers <irogers@google.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
---
 arch/alpha/include/asm/processor.h | 3 +--
 arch/alpha/kernel/process.c        | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h
index c461a26d47b3..73251cd671e0 100644
--- a/arch/alpha/include/asm/processor.h
+++ b/arch/alpha/include/asm/processor.h
@@ -43,8 +43,7 @@ unsigned long __get_wchan(struct task_struct *p);
 
 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
 
-#define KSTK_ESP(tsk) \
-  ((tsk) == current ? rdusp() : task_thread_info(tsk)->pcb.usp)
+#define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk))
 
 #define cpu_relax()	barrier()
 
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 06522451f018..7861c9e767b7 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -318,7 +318,7 @@ dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt, struct thread_info *ti)
 	dest[27] = pt->r27;
 	dest[28] = pt->r28;
 	dest[29] = pt->gp;
-	dest[30] = ti == current_thread_info() ? rdusp() : ti->pcb.usp;
+	dest[30] = user_stack_pointer(pt);
 	dest[31] = pt->pc;
 
 	/* Once upon a time this was the PS value.  Which is stupid

-- 
2.55.0