X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-ia64%2Fptrace.h;h=2af819be15eaababf7158840de5b5b6787d4bdb2;hb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;hp=48398a30de812c14aaa865fb8126f887edd1bcee;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-ia64/ptrace.h b/include/asm-ia64/ptrace.h
index 48398a30d..2af819be1 100644
--- a/include/asm-ia64/ptrace.h
+++ b/include/asm-ia64/ptrace.h
@@ -229,6 +229,15 @@ struct switch_stack {
  * the canonical representation by adding to instruction pointer.
  */
 # define instruction_pointer(regs) ((regs)->cr_iip + ia64_psr(regs)->ri)
+/* Conserve space in histogram by encoding slot bits in address
+ * bits 2 and 3 rather than bits 0 and 1.
+ */
+#define profile_pc(regs)						\
+({									\
+	unsigned long __ip = instruction_pointer(regs);			\
+	(__ip & ~3UL) + ((__ip & 3UL) << 2);				\
+})
+
   /* given a pointer to a task_struct, return the user's pt_regs */
 # define ia64_task_regs(t)		(((struct pt_regs *) ((char *) (t) + IA64_STK_OFFSET)) - 1)
 # define ia64_psr(regs)			((struct ia64_psr *) &(regs)->cr_ipsr)