+++ /dev/null
-From eb8d1bbdfea80a50ce9fbf3238062a543036f855 Mon Sep 17 00:00:00 2001
-From: Gustavo Zacarias <gustavo@zacarias.com.ar>
-Date: Tue, 7 Oct 2014 11:03:03 -0300
-Subject: [PATCH] btrfs-progs: add option to disable backtrace usage
-
-This commit adds the support for a make variable named
-"DISABLE_BACKTRACE" which allows to disable the support for backtrace()
-usage on ASSERT(), BUG() and BUG_ON() calls.
-This is useful because some alternative C libraries like uClibc have
-optional support for backtrace() which is rarely built when debugging
-isn't taking place.
-
-Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
----
- Makefile | 4 ++++
- kerncompat.h | 15 +++++++++++++++
- 2 files changed, 19 insertions(+)
-
-diff --git a/Makefile b/Makefile
-index 7cc7783..03a4779 100644
---- a/Makefile
-+++ b/Makefile
-@@ -63,6 +63,10 @@ BUILDDIRS = $(patsubst %,build-%,$(SUBDIRS))
- INSTALLDIRS = $(patsubst %,install-%,$(SUBDIRS))
- CLEANDIRS = $(patsubst %,clean-%,$(SUBDIRS))
-
-+ifeq ($(DISABLE_BACKTRACE),1)
-+AM_CFLAGS += -DBTRFS_DISABLE_BACKTRACE
-+endif
-+
- ifneq ($(DISABLE_DOCUMENTATION),1)
- BUILDDIRS += build-Documentation
- INSTALLDIRS += install-Documentation
-diff --git a/kerncompat.h b/kerncompat.h
-index 19c7fa5..889d94c 100644
---- a/kerncompat.h
-+++ b/kerncompat.h
-@@ -29,7 +29,9 @@
- #include <stddef.h>
- #include <linux/types.h>
- #include <stdint.h>
-+#ifndef BTRFS_DISABLE_BACKTRACE
- #include <execinfo.h>
-+#endif
-
- #define ptr_to_u64(x) ((u64)(uintptr_t)x)
- #define u64_to_ptr(x) ((void *)(uintptr_t)x)
-@@ -55,6 +57,7 @@
- #define ULONG_MAX (~0UL)
- #endif
-
-+#ifndef BTRFS_DISABLE_BACKTRACE
- #define MAX_BACKTRACE 16
- static inline void print_trace(void)
- {
-@@ -81,6 +84,9 @@ static inline void assert_trace(const char *assertion, const char *filename,
- }
-
- #define BUG() assert_trace(NULL, __FILE__, __func__, __LINE__, 0)
-+#else
-+#define BUG() assert(0)
-+#endif
-
- #ifdef __CHECKER__
- #define __force __attribute__((force))
-@@ -264,10 +270,19 @@ static inline long IS_ERR(const void *ptr)
- #define kstrdup(x, y) strdup(x)
- #define kfree(x) free(x)
-
-+#ifndef BTRFS_DISABLE_BACKTRACE
- #define BUG_ON(c) assert_trace(#c, __FILE__, __func__, __LINE__, !(c))
-+#else
-+#define BUG_ON(c) assert(!(c))
-+#endif
-
- #define WARN_ON(c) BUG_ON(c)
-+
-+#ifndef BTRFS_DISABLE_BACKTRACE
- #define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (c))
-+#else
-+#define ASSERT(c) assert(c)
-+#endif
-
- #define container_of(ptr, type, member) ({ \
- const typeof( ((type *)0)->member ) *__mptr = (ptr); \
---
-2.0.4
-