diff options
| author | Josh Poimboeuf <[email protected]> | 2017-09-27 10:36:38 -0500 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-09-28 07:25:54 +0200 |
| commit | 607a4029d439cdfa258aff5da32bb9cd6ed1a66d (patch) | |
| tree | f370578574533527b649479db1703f0a82db99c3 /lib/pm-notifier-error-inject.c | |
| parent | da541b20021c781f8b65492eeaee824e729599eb (diff) | |
objtool: Support unoptimized frame pointer setup
Arnd Bergmann reported a bunch of warnings like:
crypto/jitterentropy.o: warning: objtool: jent_fold_time()+0x3b: call without frame pointer save/setup
crypto/jitterentropy.o: warning: objtool: jent_stuck()+0x1d: call without frame pointer save/setup
crypto/jitterentropy.o: warning: objtool: jent_unbiased_bit()+0x15: call without frame pointer save/setup
crypto/jitterentropy.o: warning: objtool: jent_read_entropy()+0x32: call without frame pointer save/setup
crypto/jitterentropy.o: warning: objtool: jent_entropy_collector_free()+0x19: call without frame pointer save/setup
and
arch/x86/events/core.o: warning: objtool: collect_events uses BP as a scratch register
arch/x86/events/core.o: warning: objtool: events_ht_sysfs_show()+0x22: call without frame pointer save/setup
With certain rare configurations, GCC sometimes sets up the frame
pointer with:
lea (%rsp),%rbp
instead of:
mov %rsp,%rbp
The instructions are equivalent, so treat the former like the latter.
Reported-by: Arnd Bergmann <[email protected]>
Signed-off-by: Josh Poimboeuf <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/a468af8b28a69b83fffc6d7668be9b6fcc873699.1506526584.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'lib/pm-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions