On Wed, 16 Jan 2019 16:32:58 -0800 Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx> wrote: > Add new flag for handling freeing of special permissioned memory in vmalloc > and remove places where memory was set RW before freeing which is no longer > needed. > > In kprobes, bpf and ftrace this just adds the flag, and removes the now > unneeded set_memory_ calls before calling vfree. > > In modules, the freeing of init sections is moved to a work queue, since > freeing of RO memory is not supported in an interrupt by vmalloc. > Instead of call_rcu, it now uses synchronize_rcu() in the work queue. > > Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx> > Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx> > Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx> > Cc: Alexei Starovoitov <ast@xxxxxxxxxx> > Cc: Jessica Yu <jeyu@xxxxxxxxxx> > Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> > Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxx> > Signed-off-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx> > --- > arch/x86/kernel/ftrace.c | 6 +-- For the ftrace code. Acked-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> -- Steve > arch/x86/kernel/kprobes/core.c | 7 +--- > include/linux/filter.h | 16 ++----- > kernel/bpf/core.c | 1 - > kernel/module.c | 77 +++++++++++++++++----------------- > 5 files changed, 45 insertions(+), 62 deletions(-) >
