637a642f5c
With CONFIG_ZSTD_COMPRESS=m and CONFIG_ZSTD_DECOMPRESS=y we end up in a situation when files from lib/zstd/common/ are compiled once to be linked later for ZSTD_DECOMPRESS (build-in) and ZSTD_COMPRESS (module) even though CFLAGS are different for builtins and modules. So far somehow this was not a problem but enabling LLVM LTO exposes the problem as: ld.lld: error: linking module flags 'Code Model': IDs have conflicting values in 'lib/built-in.a(zstd_common.o at 5868)' and 'ld-temp.o' This particular conflict is caused by KBUILD_CFLAGS=-mcmodel=medium vs. KBUILD_CFLAGS_MODULE=-mcmodel=large , modules use the large model on POWERPC as explained at https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/powerpc/Makefile?h=v5.18-rc4#n127 but the current use of common files is wrong anyway. This works around the issue by introducing a zstd_common module with shared code. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
93 lines
3 KiB
C
93 lines
3 KiB
C
/*
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* Copyright (c) Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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/*-*************************************
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* Dependencies
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***************************************/
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#include <linux/module.h>
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#define ZSTD_DEPS_NEED_MALLOC
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#include "zstd_deps.h" /* ZSTD_malloc, ZSTD_calloc, ZSTD_free, ZSTD_memset */
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#include "error_private.h"
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#include "zstd_internal.h"
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/*-****************************************
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* Version
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******************************************/
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unsigned ZSTD_versionNumber(void) { return ZSTD_VERSION_NUMBER; }
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const char* ZSTD_versionString(void) { return ZSTD_VERSION_STRING; }
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/*-****************************************
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* ZSTD Error Management
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******************************************/
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#undef ZSTD_isError /* defined within zstd_internal.h */
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/*! ZSTD_isError() :
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* tells if a return value is an error code
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* symbol is required for external callers */
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unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
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EXPORT_SYMBOL_GPL(ZSTD_isError);
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/*! ZSTD_getErrorName() :
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* provides error code string from function result (useful for debugging) */
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const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }
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EXPORT_SYMBOL_GPL(ZSTD_getErrorName);
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/*! ZSTD_getError() :
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* convert a `size_t` function result into a proper ZSTD_errorCode enum */
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ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }
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EXPORT_SYMBOL_GPL(ZSTD_getErrorCode);
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/*! ZSTD_getErrorString() :
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* provides error code string from enum */
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const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorString(code); }
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/*=**************************************************************
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* Custom allocator
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****************************************************************/
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void* ZSTD_customMalloc(size_t size, ZSTD_customMem customMem)
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{
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if (customMem.customAlloc)
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return customMem.customAlloc(customMem.opaque, size);
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return ZSTD_malloc(size);
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}
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EXPORT_SYMBOL_GPL(ZSTD_customMalloc);
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void* ZSTD_customCalloc(size_t size, ZSTD_customMem customMem)
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{
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if (customMem.customAlloc) {
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/* calloc implemented as malloc+memset;
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* not as efficient as calloc, but next best guess for custom malloc */
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void* const ptr = customMem.customAlloc(customMem.opaque, size);
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ZSTD_memset(ptr, 0, size);
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return ptr;
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}
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return ZSTD_calloc(1, size);
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}
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EXPORT_SYMBOL_GPL(ZSTD_customCalloc);
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void ZSTD_customFree(void* ptr, ZSTD_customMem customMem)
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{
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if (ptr!=NULL) {
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if (customMem.customFree)
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customMem.customFree(customMem.opaque, ptr);
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else
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ZSTD_free(ptr);
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}
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}
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EXPORT_SYMBOL_GPL(ZSTD_customFree);
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION("Zstd Common");
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