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| author |   Jason Gerecke <killertofu@gmail.com> | 2021-02-11 13:48:48 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2021-03-06 12:51:00 +0100 |
| commit | 864b435514b286c0be2a38a02f487aa28d990ef8 (patch) | |
| tree | bb74bf3a26e61bb8e80ff0b2df5129aefc16d7ab /include/linux/lockdep.h | |
| parent | locking/csd_lock: Add more data to CSD lock debugging (diff) | |
| download | wireguard-linux-864b435514b286c0be2a38a02f487aa28d990ef8.tar.xz wireguard-linux-864b435514b286c0be2a38a02f487aa28d990ef8.zip | |
x86/jump_label: Mark arguments as const to satisfy asm constraints
When compiling an external kernel module with `-O0` or `-O1`, the following
compile error may be reported:
./arch/x86/include/asm/jump_label.h:25:2: error: impossible constraint in ‘asm’
25 | asm_volatile_goto("1:"
| ^~~~~~~~~~~~~~~~~
It appears that these lower optimization levels prevent GCC from detecting
that the key/branch arguments can be treated as constants and used as
immediate operands. To work around this, explicitly add the `const` label.
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20210211214848.536626-1-jason.gerecke@wacom.com
Diffstat (limited to 'include/linux/lockdep.h')
0 files changed, 0 insertions, 0 deletions