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[PULL,19/19] docs/devel: add some clarifying text for aliases

Message ID 20220118120229.196337-20-f4bug@amsat.org
State Accepted
Commit 9d696cd50442327fd71ec7309e7b0c6fee693b1d
Headers show
Series None | expand

Commit Message

Philippe Mathieu-Daudé Jan. 18, 2022, 12:02 p.m. UTC 
From: Alex Bennée <alex.bennee@linaro.org>

We do mention the limitation of single parenthood for
memory_region_add_subregion but lets also make it clear how aliases
help solve that conundrum.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220110175104.2908956-7-alex.bennee@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 docs/devel/memory.rst | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)
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Patch

diff --git a/docs/devel/memory.rst b/docs/devel/memory.rst
index 5dc8a126829..69c5e3f914a 100644
--- a/docs/devel/memory.rst
+++ b/docs/devel/memory.rst
@@ -67,11 +67,15 @@  MemoryRegion):
 
   You initialize a pure container with memory_region_init().
 
-- alias: a subsection of another region.  Aliases allow a region to be
-  split apart into discontiguous regions.  Examples of uses are memory banks
-  used when the guest address space is smaller than the amount of RAM
-  addressed, or a memory controller that splits main memory to expose a "PCI
-  hole".  Aliases may point to any type of region, including other aliases,
+- alias: a subsection of another region. Aliases allow a region to be
+  split apart into discontiguous regions. Examples of uses are memory
+  banks used when the guest address space is smaller than the amount
+  of RAM addressed, or a memory controller that splits main memory to
+  expose a "PCI hole". You can also create aliases to avoid trying to
+  add the original region to multiple parents via
+  `memory_region_add_subregion`.
+
+  Aliases may point to any type of region, including other aliases,
   but an alias may not point back to itself, directly or indirectly.
   You initialize these with memory_region_init_alias().