high_physmem has already been declared in as-layout.h, so there is
no need to declare it explicitly in the .c file again.

While at it, group the declarations of __real_malloc and __real_free
together to make the code slightly more readable.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
---
 arch/um/os-Linux/main.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index f98ff79cdbf7..cf1179ed1aec 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -182,6 +182,7 @@ int __init main(int argc, char **argv, char **envp)
 }
 
 extern void *__real_malloc(int);
+extern void __real_free(void *);
 
 /* workaround for -Wmissing-prototypes warnings */
 void *__wrap_malloc(int size);
@@ -219,10 +220,6 @@ void *__wrap_calloc(int n, int size)
 	return ptr;
 }
 
-extern void __real_free(void *);
-
-extern unsigned long high_physmem;
-
 void __wrap_free(void *ptr)
 {
 	unsigned long addr = (unsigned long) ptr;
-- 
2.34.1