From: Anton Blanchard <an...@samba.org> I see a panic in early boot when building with a recent gcc toolchain. The issue is a divide by zero, which is undefined. Older toolchains let us get away with it:
int foo(int a) { return a / 0; } foo: li 9,0 divw 3,3,9 extsw 3,3 blr But newer ones catch it: foo: trap Add a check to avoid the divide by zero. Fixes: bd067f83b084 ("powerpc/64: Fix naming of cache block vs. cache line") Signed-off-by: Anton Blanchard <an...@samba.org> --- arch/powerpc/kernel/setup_64.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index adf2084..afd1c26 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -408,7 +408,8 @@ static void init_cache_info(struct ppc_cache_info *info, u32 size, u32 lsize, info->line_size = lsize; info->block_size = bsize; info->log_block_size = __ilog2(bsize); - info->blocks_per_page = PAGE_SIZE / bsize; + if (bsize) + info->blocks_per_page = PAGE_SIZE / bsize; if (sets == 0) info->assoc = 0xffff; -- 2.7.4