Hello all, I have a driver that I need to compile in RedHat 6 Kernel release 2.6.32-504.3.3.el6.x86_64
my Make file is the following

more Makefile
ifneq ($(CFG),Release)
EXTRA_CFLAGS += -g -fno-inline -O0 -Os
else
EXTRA_CFLAGS += -O2 -Wconversion -Os
endif
obj-m += blkwatch.o
blkwatch-objs := init.o devfile.o bitmap.o watch.o device.o queued_pages.o freeze.o

all:
make -C /lib/modules/$(shell uname -r)/build M=$(CURDIR) modules

clean:
make -C /lib/modules/$(shell uname -r)/build M=$(CURDIR) clean

When I run make i get an error, no such file or directory.
I checked the build directory to ensure is a soft link to /usr/src/kernels/, however the directory is empty.

Output:

make

make -C /lib/modules/2.6.32-504.3.3.el6.x86_64/build M=/root/src modules
make: *** /lib/modules/2.6.32-504.3.3.el6.x86_64/build: No such file or directory. Stop.
make: *** [all] Error 2

ls -ltr /lib/modules/uname -r/build

lrwxrwxrwx 1 root root 50 Dec 18 18:34 /lib/modules/2.6.32-504.3.3.el6.x86_64/build -> ../../../usr/src/kernels/2.6.32-504.3.3.el6.x86_64

make --debug

GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for x86_64-redhat-linux-gnu
Reading makefiles...
Updating goal targets....
File all' does not exist.
Must remake targetall'.
make -C /lib/modules/2.6.32-504.3.3.el6.x86_64/build M=/root/src modules
GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for x86_64-redhat-linux-gnu
make: *** /lib/modules/2.6.32-504.3.3.el6.x86_64/build: No such file or directory. Stop.
make: *** [all] Error 2

[ src]# ls -ltr
total 196
-rw-r--r-- 1 root root 28682 Aug 24 2014 watch.c
-rw-r--r-- 1 root root 3843 Aug 24 2014 Readme
-rw-r--r-- 1 root root 1478 Aug 24 2014 queued_pages.h
-rw-r--r-- 1 root root 4644 Aug 24 2014 queued_pages.c
-rw-r--r-- 1 root root 360 Aug 24 2014 Makefile
-rw-r--r-- 1 root root 2317 Aug 24 2014 init.c
-rw-r--r-- 1 root root 1323 Aug 24 2014 freeze.h
-rw-r--r-- 1 root root 7440 Aug 24 2014 freeze.c
-rw-r--r-- 1 root root 1356 Aug 24 2014 driver_info.h
-rw-r--r-- 1 root root 3093 Aug 24 2014 device.h
-rw-r--r-- 1 root root 8076 Aug 24 2014 device.c
-rw-r--r-- 1 root root 2140 Aug 24 2014 devfile.h
-rw-r--r-- 1 root root 24937 Aug 24 2014 devfile.c
-rw-r--r-- 1 root root 17987 Aug 24 2014 COPYING
-rw-r--r-- 1 root root 7284 Aug 24 2014 blkwatch.h
-rw-r--r-- 1 root root 10316 Aug 24 2014 blkwatchapi.h
-rw-r--r-- 1 root root 3381 Aug 24 2014 bitmap.h
-rw-r--r-- 1 root root 34268 Aug 24 2014 bitmap.c

Any suggestions will be appreciated.

Thank you