Messages in this thread Patch in this message | | | Date | Tue, 26 Feb 2019 13:16:14 -0600 | From | "Gustavo A. R. Silva" <> | Subject | [PATCH] gdbstub: mark expected switch fall-throughs |
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In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through.
This patch fixes the following warnings:
kernel/debug/gdbstub.c: In function ‘gdb_serial_stub’: kernel/debug/gdbstub.c:1031:7: warning: this statement may fall through [-Wimplicit-fallthrough=] if (remcom_in_buffer[1] == '\0') { ^ kernel/debug/gdbstub.c:1036:3: note: here case 'C': /* Exception passing */ ^~~~ kernel/debug/gdbstub.c:1040:7: warning: this statement may fall through [-Wimplicit-fallthrough=] if (tmp == 0) ^ kernel/debug/gdbstub.c:1043:3: note: here case 'c': /* Continue packet */ ^~~~ kernel/debug/gdbstub.c:1050:4: warning: this statement may fall through [-Wimplicit-fallthrough=] dbg_activate_sw_breakpoints(); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/debug/gdbstub.c:1052:3: note: here default: ^~~~~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
Notice that, in this particular case, the code comment is modified in accordance with what GCC is expecting to find.
This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- kernel/debug/gdbstub.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c index 7510dc687c0d..9f267b8905b4 100644 --- a/kernel/debug/gdbstub.c +++ b/kernel/debug/gdbstub.c @@ -1033,13 +1033,14 @@ int gdb_serial_stub(struct kgdb_state *ks) return DBG_PASS_EVENT; } #endif + /* Fall through */ case 'C': /* Exception passing */ tmp = gdb_cmd_exception_pass(ks); if (tmp > 0) goto default_handle; if (tmp == 0) break; - /* Fall through on tmp < 0 */ + /* Fall through - on tmp < 0 */ case 'c': /* Continue packet */ case 's': /* Single step packet */ if (kgdb_contthread && kgdb_contthread != current) { @@ -1048,7 +1049,7 @@ int gdb_serial_stub(struct kgdb_state *ks) break; } dbg_activate_sw_breakpoints(); - /* Fall through to default processing */ + /* Fall through - to default processing */ default: default_handle: error = kgdb_arch_handle_exception(ks->ex_vector, -- 2.21.0
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