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btrfs: Mark btrfs_assertfail() __noreturn

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Fixes a bunch of warnings including:

  vmlinux.o: warning: objtool: select_reloc_root+0x314: unreachable instruction
  vmlinux.o: warning: objtool: finish_inode_if_needed+0x15b1: unreachable instruction
  vmlinux.o: warning: objtool: get_bio_sector_nr+0x259: unreachable instruction
  vmlinux.o: warning: objtool: raid_wait_read_end_io+0xc26: unreachable instruction
  vmlinux.o: warning: objtool: raid56_parity_alloc_scrub_rbio+0x37b: unreachable instruction
  ...

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/960bd9c0c9e3cfc409ba9c35a17644b11b832956.1681342859.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf 2023-04-12 16:49:38 -07:00 committed by Peter Zijlstra
parent 1c47c8758a
commit 09c5ae30d0
3 changed files with 3 additions and 2 deletions
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2
fs/btrfs/messages.c
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@ -253,7 +253,7 @@ void __cold _btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt,
#endif
#ifdef CONFIG_BTRFS_ASSERT
void __cold btrfs_assertfail(const char *expr, const char *file, int line)
void __cold __noreturn btrfs_assertfail(const char *expr, const char *file, int line)
{
pr_err("assertion failed: %s, in %s:%d\n", expr, file, line);
BUG();

2
fs/btrfs/messages.h
View File

@ -160,7 +160,7 @@ do { \
} while (0)
#ifdef CONFIG_BTRFS_ASSERT
void __cold btrfs_assertfail(const char *expr, const char *file, int line);
void __cold __noreturn btrfs_assertfail(const char *expr, const char *file, int line);
#define ASSERT(expr) \
(likely(expr) ? (void)0 : btrfs_assertfail(#expr, __FILE__, __LINE__))

1
tools/objtool/check.c
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@ -204,6 +204,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
"__ubsan_handle_builtin_unreachable",
"arch_call_rest_init",
"arch_cpu_idle_dead",
"btrfs_assertfail",
"cpu_bringup_and_idle",
"cpu_startup_entry",
"do_exit",