diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2025-06-07 10:52:28 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-11-21 11:21:31 +0100 |
| commit | 7d2c27a0ec5ecec980b623ded45758918c00b164 (patch) | |
| tree | 108a725438be7421d49514281817495852209cfa /lib | |
| parent | 5c47b7f3d1a9d7589026a201abb8ad445f029246 (diff) | |
bug: Add report_bug_entry()
Add a report_bug() variant where the bug_entry is already known. This
is useful when the exception instruction is not instantiated per-site.
But instead has a single instance. In such a case the bug_entry
address might be passed along in a known register or something.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251110115757.575795595@infradead.org
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/bug.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/lib/bug.c b/lib/bug.c index 8100258a2004..581a66b88c5c 100644 --- a/lib/bug.c +++ b/lib/bug.c @@ -183,18 +183,20 @@ static void __warn_printf(const char *fmt, struct pt_regs *regs) printk("%s", fmt); } -static enum bug_trap_type __report_bug(unsigned long bugaddr, struct pt_regs *regs) +static enum bug_trap_type __report_bug(struct bug_entry *bug, unsigned long bugaddr, struct pt_regs *regs) { bool warning, once, done, no_cut, has_args; const char *file, *fmt; unsigned line; - if (!is_valid_bugaddr(bugaddr)) - return BUG_TRAP_TYPE_NONE; + if (!bug) { + if (!is_valid_bugaddr(bugaddr)) + return BUG_TRAP_TYPE_NONE; - bug = find_bug(bugaddr); - if (!bug) - return BUG_TRAP_TYPE_NONE; + bug = find_bug(bugaddr); + if (!bug) + return BUG_TRAP_TYPE_NONE; + } disable_trace_on_warning(); @@ -244,13 +246,25 @@ static enum bug_trap_type __report_bug(unsigned long bugaddr, struct pt_regs *re return BUG_TRAP_TYPE_BUG; } +enum bug_trap_type report_bug_entry(struct bug_entry *bug, struct pt_regs *regs) +{ + enum bug_trap_type ret; + bool rcu = false; + + rcu = warn_rcu_enter(); + ret = __report_bug(bug, 0, regs); + warn_rcu_exit(rcu); + + return ret; +} + enum bug_trap_type report_bug(unsigned long bugaddr, struct pt_regs *regs) { enum bug_trap_type ret; bool rcu = false; rcu = warn_rcu_enter(); - ret = __report_bug(bugaddr, regs); + ret = __report_bug(NULL, bugaddr, regs); warn_rcu_exit(rcu); return ret; |