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Date: Tue, 10 May 2016 09:39:38 +0200 From: Jan Kiszka <jan.kiszka@...mens.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, Kieran Bingham <kieran.bingham@...aro.org>, Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org Subject: [PATCH 13/18] scripts/gdb: Add documentation example for radix tree From: Kieran Bingham <kieran.bingham@...aro.org> Provide a worked example for utilising the lx_radix_tree_lookup function Cc: Jonathan Corbet <corbet@....net> Cc: linux-doc@...r.kernel.org Signed-off-by: Kieran Bingham <kieran.bingham@...aro.org> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com> --- Documentation/gdb-kernel-debugging.txt | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/gdb-kernel-debugging.txt b/Documentation/gdb-kernel-debugging.txt index 7050ce8..4ab7d43 100644 --- a/Documentation/gdb-kernel-debugging.txt +++ b/Documentation/gdb-kernel-debugging.txt @@ -139,6 +139,27 @@ Examples of using the Linux-provided gdb helpers start_comm = "swapper/2\000\000\000\000\000\000" } + o Dig into a radix tree data structure, such as the IRQ descriptors: + (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18) + $6 = { + irq_common_data = { + state_use_accessors = 67584, + handler_data = 0x0 <__vectors_start>, + msi_desc = 0x0 <__vectors_start>, + affinity = {{ + bits = {65535} + }} + }, + irq_data = { + mask = 0, + irq = 18, + hwirq = 27, + common = 0xee803d80, + chip = 0xc0eb0854 <gic_data>, + domain = 0xee808000, + parent_data = 0x0 <__vectors_start>, + chip_data = 0xc0eb0854 <gic_data> + } <... trimmed ...> List of commands and functions ------------------------------ -- 2.1.4
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