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From: Ben Hutchings <ben@decadent.org.uk>
Date: Sat, 22 Jul 2017 17:37:33 +0100
Subject: perf tools: Fix unwind build on i386
Forwarded: no
EINVAL may not be defined when building unwind-libunwind.c with
REMOTE_UNWIND_LIBUNWIND, resulting in a compiler error in
LIBUNWIND__ARCH_REG_ID(). Its only caller, access_reg(), only checks
for a negative return value and doesn't care what it is. So change
-EINVAL to -1.
Fixes: 52ffe0ff02fc ("Support x86(32-bit) cross platform callchain unwind.")
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
Index: linux/tools/perf/arch/x86/util/unwind-libunwind.c
===================================================================
--- linux.orig/tools/perf/arch/x86/util/unwind-libunwind.c
+++ linux/tools/perf/arch/x86/util/unwind-libunwind.c
@@ -67,7 +67,7 @@ int LIBUNWIND__ARCH_REG_ID(int regnum)
break;
default:
pr_err("unwind: invalid reg id %d\n", regnum);
- return -EINVAL;
+ return -1;
}
return id;
@@ -107,7 +107,7 @@ int LIBUNWIND__ARCH_REG_ID(int regnum)
break;
default:
pr_err("unwind: invalid reg id %d\n", regnum);
- return -EINVAL;
+ return -1;
}
return id;
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