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![]() While testing ipcomp on a realtime kernel, Xiumei reported a "sleeping in atomic" bug, caused by a memory allocation while preemption is disabled (ipcomp_decompress -> alloc_page -> ... get_page_from_freelist). As Sebastian noted [1], this get_cpu() isn't actually needed, since ipcomp_decompress() is called in napi context anyway, so BH is already disabled. This patch replaces get_cpu + per_cpu_ptr with this_cpu_ptr, then simplifies the error returns, since there isn't any common operation left. [1] https://lore.kernel.org/lkml/20190820082810.ixkmi56fp7u7eyn2@linutronix.de/ Cc: Juri Lelli <jlelli@redhat.com> Reported-by: Xiumei Mu <xmu@redhat.com> Suggested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> |
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.. | ||
espintcp.c | ||
Kconfig | ||
Makefile | ||
xfrm_algo.c | ||
xfrm_compat.c | ||
xfrm_device.c | ||
xfrm_hash.c | ||
xfrm_hash.h | ||
xfrm_inout.h | ||
xfrm_input.c | ||
xfrm_interface.c | ||
xfrm_ipcomp.c | ||
xfrm_output.c | ||
xfrm_policy.c | ||
xfrm_proc.c | ||
xfrm_replay.c | ||
xfrm_state.c | ||
xfrm_sysctl.c | ||
xfrm_user.c |