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authorGustavo A. R. Silva <gustavoars@kernel.org>2020-08-24 23:36:14 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-25 00:17:44 +0300
commit6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a (patch)
tree7d33b5d3fa40ab47f2a5d711fc034a008cc9e83f /lib/bootconfig.c
parent9907ab371426da8b3cffa6cc3e4ae54829559207 (diff)
downloadlinux-6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a.tar.xz
lib: Revert use of fallthrough pseudo-keyword in lib/
The following build error for powerpc64 was reported by Nathan Chancellor: "$ scripts/config --file arch/powerpc/configs/powernv_defconfig -e KERNEL_XZ $ make -skj"$(nproc)" ARCH=powerpc CROSS_COMPILE=powerpc64le-linux- distclean powernv_defconfig zImage ... In file included from arch/powerpc/boot/../../../lib/decompress_unxz.c:234, from arch/powerpc/boot/decompress.c:38: arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c: In function 'dec_main': arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c:586:4: error: 'fallthrough' undeclared (first use in this function) 586 | fallthrough; | ^~~~~~~~~~~ This will end up affecting distribution configurations such as Debian and OpenSUSE according to my testing. I am not sure what the solution is, the PowerPC wrapper does not set -D__KERNEL__ so I am not sure that compiler_attributes.h can be safely included." In order to avoid these sort of problems, it seems that the best solution is to use /* fall through */ comments instead of the fallthrough pseudo-keyword macro in lib/, for now. Reported-by: Nathan Chancellor <natechancellor@gmail.com> Fixes: df561f6688fe ("treewide: Use fallthrough pseudo-keyword") Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-and-tested-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/bootconfig.c')
-rw-r--r--lib/bootconfig.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index 1b5de2a45b27..2c905a91d4eb 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -817,7 +817,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos)
q - 2);
break;
}
- fallthrough;
+ /* fall through */
case '=':
ret = xbc_parse_kv(&p, q, c);
break;
@@ -826,7 +826,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos)
break;
case '#':
q = skip_comment(q);
- fallthrough;
+ /* fall through */
case ';':
case '\n':
ret = xbc_parse_key(&p, q);