35 lines
1.1 KiB
Diff
35 lines
1.1 KiB
Diff
From: Ben Hutchings <ben@decadent.org.uk>
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Date: Tue, 14 Jun 2016 21:09:19 +0100
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Subject: [PATCH 1/7] liblockdep: Fix undefined symbol prandom_u32
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Forwarded: http://mid.gmane.org/20160614204713.GT7555@decadent.org.uk
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__lock_pin_lock() now calls prandom_u32() which is not defined in
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liblockdep. __lock_pin_lock() and its caller lock_pin_lock() are dead
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code in liblockdep, but we still need to provide a definition of
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prandom_u32() in case lazy binding is disabled.
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Fixes: e7904a28f533 ("locking/lockdep, sched/core: Implement a better ...")
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Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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---
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tools/lib/lockdep/common.c | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/tools/lib/lockdep/lockdep.c
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+++ b/tools/lib/lockdep/lockdep.c
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@@ -1,8 +1,15 @@
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#include <linux/lockdep.h>
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+#include <stdlib.h>
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/* Trivial API wrappers, we don't (yet) have RCU in user-space: */
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#define hlist_for_each_entry_rcu hlist_for_each_entry
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#define hlist_add_head_rcu hlist_add_head
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#define hlist_del_rcu hlist_del
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+u32 prandom_u32(void)
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+{
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+ /* Used only by lock_pin_lock() which is dead code */
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+ abort();
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+}
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+
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#include "../../../kernel/locking/lockdep.c"
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