From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: [patch V2 12/29] dma/debug: Simplify stracktrace retrieval Date: Thu, 18 Apr 2019 10:41:31 +0200 Message-ID: <20190418084254.180116966@linutronix.de> References: <20190418084119.056416939@linutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: LKML Cc: Mike Snitzer , David Airlie , Catalin Marinas , Joonas Lahtinen , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, Alexander Potapenko , Christoph Lameter , Christoph Hellwig , Alasdair Kergon , linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, kasan-dev-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, Johannes Thumshirn , Andrey Ryabinin , Alexey Dobriyan , intel-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, David Rientjes , Maarten Lankhorst , Akinobu Mita , Steven Rostedt , Josef Bacik , Rodrigo Vivi , Mike Rapoport List-Id: intel-gfx@lists.freedesktop.org Replace the indirection through struct stack_trace with an invocation of the storage array based interface. Signed-off-by: Thomas Gleixner Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: Robin Murphy Cc: Christoph Hellwig Cc: Marek Szyprowski --- kernel/dma/debug.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -89,8 +89,8 @@ struct dma_debug_entry { int sg_mapped_ents; enum map_err_types map_err_type; #ifdef CONFIG_STACKTRACE - struct stack_trace stacktrace; - unsigned long st_entries[DMA_DEBUG_STACKTRACE_ENTRIES]; + unsigned int stack_len; + unsigned long stack_entries[DMA_DEBUG_STACKTRACE_ENTRIES]; #endif }; @@ -174,7 +174,7 @@ static inline void dump_entry_trace(stru #ifdef CONFIG_STACKTRACE if (entry) { pr_warning("Mapped at:\n"); - print_stack_trace(&entry->stacktrace, 0); + stack_trace_print(entry->stack_entries, entry->stack_len, 0); } #endif } @@ -704,12 +704,9 @@ static struct dma_debug_entry *dma_entry spin_unlock_irqrestore(&free_entries_lock, flags); #ifdef CONFIG_STACKTRACE - entry->stacktrace.max_entries = DMA_DEBUG_STACKTRACE_ENTRIES; - entry->stacktrace.entries = entry->st_entries; - entry->stacktrace.skip = 1; - save_stack_trace(&entry->stacktrace); + entry->stack_len = stack_trace_save(entry->stack_entries, + ARRAY_SIZE(entry->stack_entries), 1); #endif - return entry; }