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@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@oscar:~/workspace/u-boot$ make odroid_defconfig # # configuration written to .config # masahiro@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++) { ^