[PATCH] fixup! malloc: implement malloc_usable_size()

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

 - Prevent sandbox from using libc function inadvertently
 - Implement wrapper for libc malloc
 - Implement for dummy_malloc

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 arch/sandbox/Makefile         | 1 +
 arch/sandbox/os/libc_malloc.c | 5 +++++
 common/dummy_malloc.c         | 5 +++++
 3 files changed, 11 insertions(+)

diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile
index d5327d44e097..5c51f2de38b3 100644
--- a/arch/sandbox/Makefile
+++ b/arch/sandbox/Makefile
@@ -23,6 +23,7 @@ lds-y   := $(BOARD)/barebox.lds
 TEXT_BASE = $(CONFIG_TEXT_BASE)
 KBUILD_CFLAGS += -Dmalloc=barebox_malloc -Dcalloc=barebox_calloc \
 		-Dmalloc_stats=barebox_malloc_stats -Dmemalign=barebox_memalign \
+		-Dmalloc_usable_size=barebox_malloc_usable_size \
 		-Dfree=barebox_free -Drealloc=barebox_realloc \
 		-Dread=barebox_read -Dwrite=barebox_write \
 		-Dopen=barebox_open -Dclose=barebox_close \
diff --git a/arch/sandbox/os/libc_malloc.c b/arch/sandbox/os/libc_malloc.c
index 975c41b0ec49..e34156cd49e7 100644
--- a/arch/sandbox/os/libc_malloc.c
+++ b/arch/sandbox/os/libc_malloc.c
@@ -32,6 +32,11 @@ void *barebox_malloc(size_t size)
 	return mem;
 }
 
+size_t barebox_malloc_usable_size(void *mem)
+{
+	return malloc_usable_size(mem);
+}
+
 void barebox_free(void *ptr)
 {
 	free(ptr);
diff --git a/common/dummy_malloc.c b/common/dummy_malloc.c
index 7a96afec76e0..140ba314272a 100644
--- a/common/dummy_malloc.c
+++ b/common/dummy_malloc.c
@@ -30,6 +30,11 @@ void free(void *ptr)
 {
 }
 
+size_t malloc_usable_size(void *mem)
+{
+	BUG();
+}
+
 void *realloc(void *ptr, size_t size)
 {
 	BUG();
-- 
2.39.2