build_bug.h: remove BUILD_BUG_ON_NULL()
This macro is only used by net/ipv6/mcast.c, but there is no reason why it must be BUILD_BUG_ON_NULL(). Replace it with BUILD_BUG_ON_ZERO(), and remove BUILD_BUG_ON_NULL() definition from <linux/build_bug.h>. Link: http://lkml.kernel.org/r/1515121833-3174-3-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Ian Abbott <abbotti@mev.co.uk> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -8,7 +8,6 @@
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#define __BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
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#define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
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#define BUILD_BUG_ON_ZERO(e) (0)
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#define BUILD_BUG_ON_NULL(e) ((void *)0)
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#define BUILD_BUG_ON_INVALID(e) (0)
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#define BUILD_BUG_ON_MSG(cond, msg) (0)
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#define BUILD_BUG_ON(condition) (0)
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@ -28,7 +27,6 @@
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* aren't permitted).
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*/
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#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); }))
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#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:(-!!(e)); }))
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/*
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* BUILD_BUG_ON_INVALID() permits the compiler to check the validity of the
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@ -65,10 +65,10 @@
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#include <net/ip6_checksum.h>
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/* Ensure that we have struct in6_addr aligned on 32bit word. */
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static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
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BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
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BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
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BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
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static int __mld2_query_bugs[] __attribute__((__unused__)) = {
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BUILD_BUG_ON_ZERO(offsetof(struct mld2_query, mld2q_srcs) % 4),
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BUILD_BUG_ON_ZERO(offsetof(struct mld2_report, mld2r_grec) % 4),
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BUILD_BUG_ON_ZERO(offsetof(struct mld2_grec, grec_mca) % 4)
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};
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static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
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