[U-Boot] Please fix warnings on ARM Samsung boards

[Masahiro YAMADA]

Hi Samsung developers,


I see some warnings when I build Samsung boards.


I requested this three months ago,
but nobody would fix the warnings.
http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/191762




masahiro at oscar:~/workspace/u-boot$ arm-unknown-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-unknown-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/opt/gcc-4.9.0-nolibc/arm-unknown-linux-gnueabi/bin/../libexec/gcc/arm-unknown-linux-gnueabi/4.9.0/lto-wrapper
Target: arm-unknown-linux-gnueabi
Configured with: /home/tony/buildall/src/gcc/configure
--target=arm-unknown-linux-gnueabi --host=x86_64-linux-gnu
--build=x86_64-linux-gnu --enable-targets=all
--prefix=/opt/cross/gcc-4.9.0-nolibc/arm-unknown-linux-gnueabi/
--enable-languages=c --with-newlib --without-headers --disable-nls
--disable-threads --disable-shared --disable-libmudflap
--disable-libssp --disable-libgomp --disable-decimal-float
--enable-checking=release
--with-mpfr=/home/tony/buildall/src/sys-x86_64
--with-gmp=/home/tony/buildall/src/sys-x86_64 --disable-bootstrap
--disable-libquadmath --disable-libatomic
Thread model: single
gcc version 4.9.0 (GCC)
masahiro at oscar:~/workspace/u-boot$ make odroid_defconfig
#
# configuration written to .config
#
masahiro at oscar:~/workspace/u-boot$ make CROSS_COMPILE=arm-unknown-linux-gnueabi-
[ snip ]
  LD      arch/arm/cpu/armv7/s5p-common/built-in.o
  LD      arch/arm/cpu/armv7/built-in.o
  AS      arch/arm/cpu/armv7/start.o
  CC      arch/arm/cpu/armv7/exynos/clock.o
arch/arm/cpu/armv7/exynos/clock.c: In function 'clock_get_periph_rate':
arch/arm/cpu/armv7/exynos/clock.c:264:47: warning: array subscript is
above array bounds [-Warray-bounds]
  struct clk_bit_info *bit_info = &clk_bit_info[peripheral];
                                               ^
arch/arm/cpu/armv7/exynos/clock.c:264:47: warning: array subscript is
above array bounds [-Warray-bounds]
 [ snip ]
  LD      arch/arm/lib/built-in.o
  CC      arch/arm/lib/eabi_compat.o
  CC      board/samsung/common/gadget.o
  CC      board/samsung/common/misc.o
  CC      board/samsung/common/board.o
board/samsung/common/board.c: In function 'dram_init':
board/samsung/common/board.c:95:32: warning: iteration 4u invokes
undefined behavior [-Waggressive-loop-optimizations]
   addr = CONFIG_SYS_SDRAM_BASE + (i * SDRAM_BANK_SIZE);
                                ^
board/samsung/common/board.c:94:2: note: containing loop
  for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
  ^
board/samsung/common/board.c: In function 'dram_init_banksize':
board/samsung/common/board.c:107:32: warning: iteration 4u invokes
undefined behavior [-Waggressive-loop-optimizations]
   addr = CONFIG_SYS_SDRAM_BASE + (i * SDRAM_BANK_SIZE);
                                ^
board/samsung/common/board.c:106:2: note: containing loop
  for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
  ^




-- 
Best Regards
Masahiro Yamada