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The kernel build for s390 fails for gcc compilers with version 3.x, set the minimum required version of gcc to version 4.3. As the atomic builtins are available with all gcc 4.x compilers, use the __sync_val_compare_and_swap and __sync_bool_compare_and_swap functions to replace the complex macro and inline assembler magic in include/asm/cmpxchg.h. The compiler can just-do-it and generates better code with the builtins. While we are at it use __sync_bool_compare_and_swap for the _raw_compare_and_swap function in the spinlock code as well. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| crypto | ||
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| include | ||
| kernel | ||
| kvm | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| pci | ||
| defconfig | ||
| Kbuild | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||