Fix kernel compilation errors for modern toolchains (Python 3, GCC 10+)

[Copilot]

Overview

This PR fixes all compilation errors in the MT6765 kernel source (Linux 4.9.190) to enable successful compilation with modern toolchains, including Python 3 and GCC 10+.

Problem

The kernel source code failed to compile due to:

1. Python 2 to 3 incompatibility - Build scripts (DrvGen.py and related tools) used deprecated Python 2 syntax
2. Device Tree Compiler linker errors - Multiple definition of yylloc symbol
3. Strict GCC warnings - Modern GCC versions treat more warnings as errors
4. Incorrect header include paths - Local headers using system include syntax

Changes Made

Python 3 Compatibility Fixes

Fixed all Python 2 syntax in tools/dct/ to work with Python 3:

• Updated print statements to use function syntax: print(...) instead of print ...
• Fixed exception syntax: except Exception as e: instead of except Exception, e:
• Replaced deprecated string.atoi() with int()
• Replaced removed cmp() function with direct comparison operators
• Updated ConfigParser imports for Python 3 compatibility
• Fixed relative imports to absolute imports in all dct Python modules
• Added strict=False to ConfigParser instances to handle duplicate config keys

Device Tree Compiler Fix

• Changed yylloc declaration from regular variable to extern in scripts/dtc/dtc-lexer.l and scripts/dtc/dtc-lexer.lex.c_shipped to prevent multiple definition linker errors

GCC Compiler Warning Fixes

Addressed various strict compiler warnings now treated as errors:

Array Comparison Warnings:

• Added explicit type casts in mm/page_alloc.c to fix array symbol comparison warnings

Function Name Conflicts:

• Renamed free() to xts_free() in crypto/xts.c to avoid conflict with stdlib function

Uninitialized Variable Warnings:

• Initialized buffers in: sound/soc/soc-core.c, net/compat.c, net/wireless/wext-core.c, lib/kstrtox.c, drivers/base/regmap/regcache-rbtree.c

False Positive Warnings:

• Added pragmas to suppress false-positive warnings in:
  • arch/arm64/include/asm/cmpxchg.h (array-bounds in atomic operations)
  • arch/arm64/include/asm/syscall.h (array-bounds in syscall handling)
  • lib/reed_solomon/decode_rs.c (stringop-overflow and restrict)

Header Include Path Fixes

Fixed all local header includes in drivers/devfreq/ to use quotes instead of angle brackets:

• Changed #include <helio-dvfsrc*.h> to #include "helio-dvfsrc*.h"
• Changed #include <mtk_dvfsrc*.h> to #include "mtk_dvfsrc*.h"

This ensures the compiler searches in the local directory first rather than system include paths.

Testing

• Successfully compiled kernel with k65v1_64_bsp_defconfig configuration
• Used aarch64-linux-gnu-gcc cross-compilation toolchain
• All compilation errors resolved, kernel builds without errors

Impact

This PR makes the kernel source compatible with:

• Python 3.x (tested with 3.12)
• Modern GCC versions (tested with GCC 11+)
• Current build environments and CI/CD systems

No functional changes to the kernel code - all fixes are build-system and compatibility related.

Warning

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I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
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Original prompt

Compile This Kernel Source And Fix Errors.

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[techdiwas]

Nicely done.