linux-kernel - [PATCH] Documentation/powerpc: fix malformed table in syscall64-abi

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Date:   Sun, 23 Aug 2020 17:31:16 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     LKML <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        linuxppc-dev@...ts.ozlabs.org, Nicholas Piggin <npiggin@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH] Documentation/powerpc: fix malformed table in syscall64-abi

From: Randy Dunlap <rdunlap@...radead.org>

Fix malformed table warning in powerpc/syscall64-abi.rst by making
two tables and moving the headings.

Documentation/powerpc/syscall64-abi.rst:53: WARNING: Malformed table.
Text in column margin in table line 2.

=========== ============= ========================================
--- For the sc instruction, differences with the ELF ABI ---
r0          Volatile      (System call number.)
r3          Volatile      (Parameter 1, and return value.)
r4-r8       Volatile      (Parameters 2-6.)
cr0         Volatile      (cr0.SO is the return error condition.)
cr1, cr5-7  Nonvolatile
lr          Nonvolatile

--- For the scv 0 instruction, differences with the ELF ABI ---
r0          Volatile      (System call number.)
r3          Volatile      (Parameter 1, and return value.)
r4-r8       Volatile      (Parameters 2-6.)
=========== ============= ========================================

Fixes: 7fa95f9adaee ("powerpc/64s: system call support for scv/rfscv instructions")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Nicholas Piggin <npiggin@...il.com>
Cc: Michael Ellerman <mpe@...erman.id.au>
---
 Documentation/powerpc/syscall64-abi.rst |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- lnx-59-rc2.orig/Documentation/powerpc/syscall64-abi.rst
+++ lnx-59-rc2/Documentation/powerpc/syscall64-abi.rst
@@ -49,16 +49,18 @@ Register preservation rules
 Register preservation rules match the ELF ABI calling sequence with the
 following differences:
 
-=========== ============= ========================================
 --- For the sc instruction, differences with the ELF ABI ---
+=========== ============= ========================================
 r0          Volatile      (System call number.)
 r3          Volatile      (Parameter 1, and return value.)
 r4-r8       Volatile      (Parameters 2-6.)
 cr0         Volatile      (cr0.SO is the return error condition.)
 cr1, cr5-7  Nonvolatile
 lr          Nonvolatile
+=========== ============= ========================================
 
 --- For the scv 0 instruction, differences with the ELF ABI ---
+=========== ============= ========================================
 r0          Volatile      (System call number.)
 r3          Volatile      (Parameter 1, and return value.)
 r4-r8       Volatile      (Parameters 2-6.)