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m68k: align bootinfo strings and data to 4 bytes
Various tools, such as kexec-tools and m68k-bootinfo, expect each bootinfo entry to be aligned to 4 bytes, not 2 bytes. So adjust the padding to fill this out as such. Also, break apart the padding additions from the other field length additions, so that it's more clear why these magic numbers are being added, and comment them too. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220926113900.1256630-2-Jason@zx2c4.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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@ -48,13 +48,14 @@
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stw_phys(as, base, id); \
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base += 2; \
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stw_phys(as, base, \
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(sizeof(struct bi_record) + strlen(string) + 2) & ~1); \
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(sizeof(struct bi_record) + strlen(string) + \
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1 /* null termination */ + 3 /* padding */) & ~3); \
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base += 2; \
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for (i = 0; string[i]; i++) { \
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stb_phys(as, base++, string[i]); \
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} \
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stb_phys(as, base++, 0); \
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base = (base + 1) & ~1; \
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base = (base + 3) & ~3; \
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} while (0)
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#define BOOTINFODATA(as, base, id, data, len) \
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@ -63,13 +64,14 @@
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stw_phys(as, base, id); \
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base += 2; \
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stw_phys(as, base, \
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(sizeof(struct bi_record) + len + 3) & ~1); \
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(sizeof(struct bi_record) + len + \
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2 /* length field */ + 3 /* padding */) & ~3); \
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base += 2; \
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stw_phys(as, base, len); \
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base += 2; \
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for (i = 0; i < len; ++i) { \
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stb_phys(as, base++, data[i]); \
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} \
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base = (base + 1) & ~1; \
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base = (base + 3) & ~3; \
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} while (0)
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#endif
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