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netpoll: avoid put_unaligned() on single character
With a planned cleanup, using put_unaligned() on a single character
results in a harmless warning:
In file included from ./arch/x86/include/generated/asm/unaligned.h:1,
from include/linux/etherdevice.h:24,
from net/core/netpoll.c:18:
net/core/netpoll.c: In function 'netpoll_send_udp':
include/asm-generic/unaligned.h:23:9: error: 'packed' attribute ignored for field of type 'unsigned char' [-Werror=attributes]
net/core/netpoll.c:431:3: note: in expansion of macro 'put_unaligned'
431 | put_unaligned(0x60, (unsigned char *)ip6h);
| ^~~~~~~~~~~~~
include/asm-generic/unaligned.h:23:9: error: 'packed' attribute ignored for field of type 'unsigned char' [-Werror=attributes]
net/core/netpoll.c:459:3: note: in expansion of macro 'put_unaligned'
459 | put_unaligned(0x45, (unsigned char *)iph);
| ^~~~~~~~~~~~~
Replace this with an open-coded pointer dereference.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>