Commit 72d3ebb9 authored Dec 30, 2018 by Mathias Krause Committed by Masahiro Yamada Jan 06, 2019

kallsyms: lower alignment on ARM



As mentioned in the info pages of gas, the '.align' pseudo op's
interpretation of the alignment value is architecture specific.
It might either be a byte value or taken to the power of two.

On ARM it's actually the latter which leads to unnecessary large
alignments of 16 bytes for 32 bit builds or 256 bytes for 64 bit
builds.

Fix this by switching to '.balign' instead which is consistent
across all architectures.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

parent c3003315

scripts/kallsyms.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -334,10 +334,10 @@ static void write_src(void)
		printf("#include <asm/types.h>\n");
		printf("#if BITS_PER_LONG == 64\n");
		printf("#define PTR .quad\n");
		printf("#define ALGN .align 8\n");
		printf("#define ALGN .balign 8\n");
		printf("#else\n");
		printf("#define PTR .long\n");
		printf("#define ALGN .align 4\n");
		printf("#define ALGN .balign 4\n");
		printf("#endif\n");

		printf("\t.section .rodata, \"a\"\n");

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