alpha: fix usp value in multithreaded coredumps

rdusp() gives us the right value only for the current thread...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 842dba3..3ec3506 100644 (file)
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -356,7 +356,7 @@ 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] = rdusp();
+       dest[30] = ti == current_thread_info() ? rdusp() : ti->pcb.usp;
        dest[31] = pt->pc;
 
        /* Once upon a time this was the PS value.  Which is stupid