Patch "scripts/gdb: raise error with reduced debugging information" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    scripts/gdb: raise error with reduced debugging information

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     scripts-gdb-raise-error-with-reduced-debugging-infor.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit dbfdc81905cc92cbf49c9769ca55644fbfc58ffe
Author: Florian Fainelli <f.fainelli@xxxxxxxxx>
Date:   Thu Apr 6 14:52:51 2023 -0700

    scripts/gdb: raise error with reduced debugging information
    
    [ Upstream commit 8af055ae25bff48f57227f5e3d48a4306f3dd1c4 ]
    
    If CONFIG_DEBUG_INFO_REDUCED is enabled in the kernel configuration, we
    will typically not be able to load vmlinux-gdb.py and will fail with:
    
    Traceback (most recent call last):
      File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/vmlinux-gdb.py", line 25, in <module>
        import linux.utils
      File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/scripts/gdb/linux/utils.py", line 131, in <module>
        atomic_long_counter_offset = atomic_long_type.get_type()['counter'].bitpos
    KeyError: 'counter'
    
    Rather be left wondering what is happening only to find out that reduced
    debug information is the cause, raise an eror.  This was not typically a
    problem until e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
    but it has since then.
    
    Link: https://lkml.kernel.org/r/20230406215252.1580538-1-f.fainelli@xxxxxxxxx
    Fixes: e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
    Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
    Cc: Antonio Borneo <antonio.borneo@xxxxxxxxxxx>
    Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
    Cc: John Ogness <john.ogness@xxxxxxxxxxxxx>
    Cc: Kieran Bingham <kbingham@xxxxxxxxxx>
    Cc: Petr Mladek <pmladek@xxxxxxxx>
    Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
index 2efbec6b6b8db..08f0587d15ea1 100644
--- a/scripts/gdb/linux/constants.py.in
+++ b/scripts/gdb/linux/constants.py.in
@@ -39,6 +39,8 @@
 
 import gdb
 
+LX_CONFIG(CONFIG_DEBUG_INFO_REDUCED)
+
 /* linux/clk-provider.h */
 if IS_BUILTIN(CONFIG_COMMON_CLK):
     LX_GDBPARSED(CLK_GET_RATE_NOCACHE)
diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py
index 4136dc2c59df2..cd03de50c3bec 100644
--- a/scripts/gdb/vmlinux-gdb.py
+++ b/scripts/gdb/vmlinux-gdb.py
@@ -22,6 +22,10 @@ except:
     gdb.write("NOTE: gdb 7.2 or later required for Linux helper scripts to "
               "work.\n")
 else:
+    import linux.constants
+    if linux.constants.LX_CONFIG_DEBUG_INFO_REDUCED:
+        raise gdb.GdbError("Reduced debug information will prevent GDB "
+                           "from having complete types.\n")
     import linux.utils
     import linux.symbols
     import linux.modules
@@ -32,7 +36,6 @@ else:
     import linux.lists
     import linux.rbtree
     import linux.proc
-    import linux.constants
     import linux.timerlist
     import linux.clk
     import linux.genpd



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