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Commit d034cfab authored by Will Deacon's avatar Will Deacon Committed by Linus Torvalds
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kexec: crash: don't save swapper_pg_dir for !CONFIG_MMU configurations 



nommu platforms don't have very interesting swapper_pg_dir pointers and
usually just #define them to NULL, meaning that we can't include them in
the vmcoreinfo on the kexec crash path.

This patch only saves the swapper_pg_dir if we have an MMU.

Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Reviewed-by: default avatarSimon Horman <horms@verge.net.au>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7d7f9848

kernel/kexec.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -1462,7 +1462,9 @@ static int __init crash_save_vmcoreinfo_init(void) 




	VMCOREINFO_SYMBOL(init_uts_ns);

	VMCOREINFO_SYMBOL(init_uts_ns);

	VMCOREINFO_SYMBOL(node_online_map);

	VMCOREINFO_SYMBOL(node_online_map);

#ifdef CONFIG_MMU

	VMCOREINFO_SYMBOL(swapper_pg_dir);

	VMCOREINFO_SYMBOL(swapper_pg_dir);

#endif

	VMCOREINFO_SYMBOL(_stext);

	VMCOREINFO_SYMBOL(_stext);

	VMCOREINFO_SYMBOL(vmlist);

	VMCOREINFO_SYMBOL(vmlist);