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ee3a46a437
The layout and contents of struct global_data depends on a lot of CONFIG_* preprocessor macros, not all of which are entirely converted to Kconfig - not to mention weird games played here and there. This can result in one translation unit using one definition of struct global_data while the actual layout is another. That can be very hard to debug. But we already have a mechanism that can help catch such bugs at build time, namely the asm-offsets machinery which is necessary anyway to provide assembly code with the necessary constants. So make sure that every C translation unit that include global_data.h actually sees the same size of struct global_data as that which was seen by the asm-offsets.c TU. It is likely that this patch will break the build of some boards. For example, without the patch from Matt Merhar (https://lists.denx.de/pipermail/u-boot/2021-May/450135.html) or some other fix, this breaks P2041RDB_defconfig: CC arch/powerpc/lib/traps.o AS arch/powerpc/cpu/mpc85xx/start.o In file included from include/asm-generic/global_data.h:26, from ./arch/powerpc/include/asm/global_data.h:109, from include/init.h:21, from arch/powerpc/lib/traps.c:7: include/linux/build_bug.h:99:41: error: static assertion failed: "sizeof(struct global_data) == GD_SIZE" 99 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) | ^~~~~~~~~~~~~~ include/linux/build_bug.h:98:34: note: in expansion of macro ‘__static_assert’ 98 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) | ^~~~~~~~~~~~~~~ include/asm-generic/global_data.h:470:1: note: in expansion of macro ‘static_assert’ 470 | static_assert(sizeof(struct global_data) == GD_SIZE); | ^~~~~~~~~~~~~ make[1]: *** [scripts/Makefile.build:266: arch/powerpc/lib/traps.o] Error 1 make: *** [Makefile:1753: arch/powerpc/lib] Error 2 make: *** Waiting for unfinished jobs.... Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Reviewed-by: Simon Glass <sjg@chromium.org> |
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| .. | ||
| bitops | ||
| atomic-long.h | ||
| atomic.h | ||
| bitsperlong.h | ||
| global_data.h | ||
| gpio.h | ||
| int-ll64.h | ||
| io.h | ||
| ioctl.h | ||
| pe.h | ||
| sections.h | ||
| signal.h | ||
| types.h | ||
| u-boot.h | ||
| unaligned.h | ||