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| author |   Josh Triplett <josh@joshtriplett.org> | 2014-04-07 15:39:14 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 16:36:10 -0700 |
| commit | b06dd879f5db33c1d7f5ab516ea671627f99c0c9 (patch) | |
| tree | 85ee4edf96b8cdc094104afe8fd0ef204df452cc /ipc/util.c | |
| parent | bug: Make BUG() always stop the machine (diff) | |
| download | wireguard-linux-b06dd879f5db33c1d7f5ab516ea671627f99c0c9.tar.xz wireguard-linux-b06dd879f5db33c1d7f5ab516ea671627f99c0c9.zip | |
x86: always define BUG() and HAVE_ARCH_BUG, even with !CONFIG_BUG
This ensures that BUG() always has a definition that causes a trap (via
an undefined instruction), and that the compiler still recognizes the
code following BUG() as unreachable, avoiding warnings that would
otherwise appear (such as on non-void functions that don't return a
value after BUG()).
In addition to saving a few bytes over the generic infinite-loop
implementation, this implementation traps rather than looping, which
potentially allows for better error-recovery behavior (such as by
rebooting).
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/util.c')
0 files changed, 0 insertions, 0 deletions