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c6f371bab2
XZ_EXTERN was used to make internal functions static in the preboot code. However, in other decompressors this hasn't been done. On x86-64, this makes no difference to the kernel image size. Omit XZ_EXTERN and let some of the internal functions be extern in the preboot code. Omitting XZ_EXTERN from include/linux/xz.h fixes warnings in "make htmldocs" and makes the intradocument links to xz_dec functions work in Documentation/staging/xz.rst. The alternative would have been to add "XZ_EXTERN" to c_id_attributes in Documentation/conf.py but omitting XZ_EXTERN seemed cleaner. Link: https://lore.kernel.org/lkml/20240723205437.3c0664b0@kaneli/ Link: https://lkml.kernel.org/r/20240724110544.16430-1-lasse.collin@tukaani.org Signed-off-by: Lasse Collin <lasse.collin@tukaani.org> Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: Jonathan Corbet <corbet@lwn.net> Cc: Sam James <sam@gentoo.org> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Joel Stanley <joel@jms.id.au> Cc: Jubin Zhong <zhongjubin@huawei.com> Cc: Jules Maselbas <jmaselbas@zdiv.net> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Rui Li <me@lirui.org> Cc: Simon Glass <sjg@chromium.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __XZ_CONFIG_H__
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#define __XZ_CONFIG_H__
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/*
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* most of this is copied from lib/xz/xz_private.h, we can't use their defines
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* since the boot wrapper is not built in the same environment as the rest of
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* the kernel.
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*/
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#include "types.h"
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#include "swab.h"
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static inline uint32_t swab32p(void *p)
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{
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uint32_t *q = p;
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return swab32(*q);
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}
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#ifdef __LITTLE_ENDIAN__
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#define get_le32(p) (*((uint32_t *) (p)))
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#define cpu_to_be32(x) swab32(x)
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static inline u32 be32_to_cpup(const u32 *p)
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{
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return swab32p((u32 *)p);
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}
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#else
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#define get_le32(p) swab32p(p)
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#define cpu_to_be32(x) (x)
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static inline u32 be32_to_cpup(const u32 *p)
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{
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return *p;
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}
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#endif
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static inline uint32_t get_unaligned_be32(const void *p)
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{
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return be32_to_cpup(p);
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}
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static inline void put_unaligned_be32(u32 val, void *p)
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{
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*((u32 *)p) = cpu_to_be32(val);
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}
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#define memeq(a, b, size) (memcmp(a, b, size) == 0)
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#define memzero(buf, size) memset(buf, 0, size)
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/* prevent the inclusion of the xz-preboot MM headers */
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#define DECOMPR_MM_H
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#define memmove memmove
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/* xz.h needs to be included directly since we need enum xz_mode */
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#include "../../../include/linux/xz.h"
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#endif
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