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| author | Ben Hutchings <ben@decadent.org.uk> | 2017-05-25 12:58:31 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-06-05 09:28:02 +0200 |
| commit | 3752466b6bf04868296ac6bc27ea1765008636d8 (patch) | |
| tree | a242c944cd9eed569d66d6918b75d5c51f0aa662 /tools/lib | |
| parent | 3c2993b8c6143d8a5793746a54eba8f86f95240f (diff) | |
| download | linux-3752466b6bf04868296ac6bc27ea1765008636d8.tar.bz2 | |
tools/lib/lockdep: Fix undefined symbol prandom_u32
__lock_pin_lock() now calls prandom_u32() which is not defined in
liblockdep. __lock_pin_lock() and its caller lock_pin_lock() are dead
code in liblockdep, but we still need to provide a definition of
prandom_u32() in case lazy binding is disabled.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: a.p.zijlstra@chello.nl
Fixes: e7904a28f533 ("locking/lockdep, sched/core: Implement a better ...")
Link: http://lkml.kernel.org/r/20170525130005.5947-2-alexander.levin@verizon.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/lockdep/lockdep.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/lib/lockdep/lockdep.c b/tools/lib/lockdep/lockdep.c index a0a2e3a266af..443acb11f907 100644 --- a/tools/lib/lockdep/lockdep.c +++ b/tools/lib/lockdep/lockdep.c @@ -1,8 +1,15 @@ #include <linux/lockdep.h> +#include <stdlib.h> /* Trivial API wrappers, we don't (yet) have RCU in user-space: */ #define hlist_for_each_entry_rcu hlist_for_each_entry #define hlist_add_head_rcu hlist_add_head #define hlist_del_rcu hlist_del +u32 prandom_u32(void) +{ + /* Used only by lock_pin_lock() which is dead code */ + abort(); +} + #include "../../../kernel/locking/lockdep.c" |