[PATCH 1/2] Documentation: riscv: uabi: Clarify ISA spec version for canonical order

[Guodong Xu <guodong@riscstar.com>]

Specify that chapter 27 refers to version 20191213 of the RISC-V ISA
Unprivileged Architecture. The chapter numbering differs across
specification versions - for example, in version 20250508, the ISA
Extension Naming Conventions is chapter 36, not chapter 27.

Historical versions of the RISC-V specification can be found via Link [1].

Link: https://riscv.org/specifications/ratified/ [1]
Fixes: f07b2b3f9d47 ("Documentation: riscv: add a section about ISA string ordering in /proc/cpuinfo")
Signed-off-by: Guodong Xu <guodong@riscstar.com>
---
 Documentation/arch/riscv/uabi.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/arch/riscv/uabi.rst b/Documentation/arch/riscv/uabi.rst
index 243e40062e34ed5057e3e79ad61311f94b7dd404..0c5299e007622a123d64cfd36ac1491b22d4255b 100644
--- a/Documentation/arch/riscv/uabi.rst
+++ b/Documentation/arch/riscv/uabi.rst
@@ -7,7 +7,9 @@ ISA string ordering in /proc/cpuinfo
 ------------------------------------
 
 The canonical order of ISA extension names in the ISA string is defined in
-chapter 27 of the unprivileged specification.
+Chapter 27 of the RISC-V Instruction Set Manual Volume I Unprivileged ISA
+(Document Version 20191213).
+
 The specification uses vague wording, such as should, when it comes to ordering,
 so for our purposes the following rules apply:
 

-- 
2.43.0


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