mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-07-25 16:19:48 +02:00
Helge DellerandGreg Kroah-Hartman
13806fc090
[ Upstream commit60365049cc] On a parisc64 kernel I sometimes notice this kernel warning: Kernel unaligned access to 0x40ff8814 at ndisc_send_skb+0xc0/0x4d8 The address 0x40ff8814 points to the in6addr_linklocal_allrouters variable and the warning simply means that some ipv6 function tries to read a 64-bit word directly from the not-64-bit aligned in6addr_linklocal_allrouters variable. Unaligned accesses are non-critical as the architecture or exception handlers usually will fix it up at runtime. Nevertheless it may trigger a performance penality for some architectures. For details read the "unaligned-memory-access" kernel documentation. The patch below ensures that the ipv6 loopback and router addresses will always be naturally aligned. This prevents the unaligned accesses for all architectures. Signed-off-by: Helge Deller <deller@gmx.de> Fixes:034dfc5df9("ipv6: export in6addr_loopback to modules") Acked-by: Paolo Abeni <pabeni@redhat.com> Link: https://lore.kernel.org/r/ZbNuFM1bFqoH-UoY@p100 Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>