From mboxrd@z Thu Jan 1 00:00:00 1970 From: Douglas Anderson Date: Mon, 12 Nov 2018 18:26:54 +0000 Subject: [PATCH v4 0/4] kgdb: Fix kgdb_roundup_cpus() Message-Id: <20181112182659.245726-1-dianders@chromium.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org This series was originally part of the series ("serial: Finish kgdb on qcom_geni; fix many lockdep splats w/ kgdb") but it made sense to split it up. It's believed that dropping into kgdb should be more robust once these patches are applied. Changes in v4: - Removed smp_mb() calls. - Also clear out .debuggerinfo. - Also clear out .debuggerinfo and .task for the master. - Remove clearing out in kdb_stub for offline CPUs; it's now redundant. Changes in v3: - No separate init call. - Don't round up the CPU that is doing the rounding up. - Add "#ifdef CONFIG_SMP" to match the rest of the file. - Updated desc saying we don't solve the "failed to roundup" case. - Document the ignored parameter. - Don't round up a CPU that failed rounding up before new for v3. - Don't back trace on a cpu that didn't round up new for v3. Changes in v2: - Removing irq flags separated from fixing lockdep splat. - Don't use smp_call_function (Daniel). Douglas Anderson (4): kgdb: Remove irq flags from roundup kgdb: Fix kgdb_roundup_cpus() for arches who used smp_call_function() kgdb: Don't round up a CPU that failed rounding up before kdb: Don't back trace on a cpu that didn't round up arch/arc/kernel/kgdb.c | 10 ++---- arch/arm/kernel/kgdb.c | 12 ------- arch/arm64/kernel/kgdb.c | 12 ------- arch/hexagon/kernel/kgdb.c | 32 ------------------- arch/mips/kernel/kgdb.c | 9 +----- arch/powerpc/kernel/kgdb.c | 6 ++-- arch/sh/kernel/kgdb.c | 12 ------- arch/sparc/kernel/smp_64.c | 2 +- arch/x86/kernel/kgdb.c | 9 ++---- include/linux/kgdb.h | 22 ++++++++----- kernel/debug/debug_core.c | 56 ++++++++++++++++++++++++++++++++- kernel/debug/debug_core.h | 1 + kernel/debug/kdb/kdb_bt.c | 11 ++++++- kernel/debug/kdb/kdb_debugger.c | 7 ----- 14 files changed, 89 insertions(+), 112 deletions(-) -- 2.19.1.930.g4563a0d9d0-goog