X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fsparc%2Fkernel%2Fkstack.h;h=53dfb92e09fb5b1a0b37e8f393fa6e3c6b0f3329;hb=ec687886de00e1e63f3d821ccade9a61590408ed;hp=5247283d1c03e57c94d40ebfea4074cdf7db3100;hpb=232486e1e9f34889424b68ee6270440b554479a2;p=safe%2Fjmp%2Flinux-2.6

diff --git a/arch/sparc/kernel/kstack.h b/arch/sparc/kernel/kstack.h
index 5247283..53dfb92 100644
--- a/arch/sparc/kernel/kstack.h
+++ b/arch/sparc/kernel/kstack.h
@@ -61,4 +61,23 @@ check_magic:
 
 }
 
+static inline __attribute__((always_inline)) void *set_hardirq_stack(void)
+{
+	void *orig_sp, *sp = hardirq_stack[smp_processor_id()];
+
+	__asm__ __volatile__("mov %%sp, %0" : "=r" (orig_sp));
+	if (orig_sp < sp ||
+	    orig_sp > (sp + THREAD_SIZE)) {
+		sp += THREAD_SIZE - 192 - STACK_BIAS;
+		__asm__ __volatile__("mov %0, %%sp" : : "r" (sp));
+	}
+
+	return orig_sp;
+}
+
+static inline __attribute__((always_inline)) void restore_hardirq_stack(void *orig_sp)
+{
+	__asm__ __volatile__("mov %0, %%sp" : : "r" (orig_sp));
+}
+
 #endif /* _KSTACK_H */