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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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af264e5989
'struct nand_ecc_engine_ops' are not modified in these drivers. Constifying this structure moves some data to a read-only section, so increases overall security, especially when the structure holds some function pointers. Update the prototype of mxic_ecc_get_pipelined_ops() accordingly. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 16709 1374 16 18099 46b3 drivers/mtd/nand/ecc-mxic.o After: ===== text data bss dec hex filename 16789 1294 16 18099 46b3 drivers/mtd/nand/ecc-mxic.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/72597e9de2320a4109be2112e696399592edacd4.1729271136.git.christophe.jaillet@wanadoo.fr
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright © 2019 Macronix
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* Author: Miquèl Raynal <miquel.raynal@bootlin.com>
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*
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* Header for the Macronix external ECC engine.
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*/
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#ifndef __MTD_NAND_ECC_MXIC_H__
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#define __MTD_NAND_ECC_MXIC_H__
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#include <linux/platform_device.h>
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#include <linux/device.h>
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struct mxic_ecc_engine;
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#if IS_ENABLED(CONFIG_MTD_NAND_ECC_MXIC) && IS_REACHABLE(CONFIG_MTD_NAND_CORE)
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const struct nand_ecc_engine_ops *mxic_ecc_get_pipelined_ops(void);
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struct nand_ecc_engine *mxic_ecc_get_pipelined_engine(struct platform_device *spi_pdev);
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void mxic_ecc_put_pipelined_engine(struct nand_ecc_engine *eng);
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int mxic_ecc_process_data_pipelined(struct nand_ecc_engine *eng,
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unsigned int direction, dma_addr_t dirmap);
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#else /* !CONFIG_MTD_NAND_ECC_MXIC */
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static inline const struct nand_ecc_engine_ops *mxic_ecc_get_pipelined_ops(void)
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{
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return NULL;
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}
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static inline struct nand_ecc_engine *
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mxic_ecc_get_pipelined_engine(struct platform_device *spi_pdev)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline void mxic_ecc_put_pipelined_engine(struct nand_ecc_engine *eng) {}
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static inline int mxic_ecc_process_data_pipelined(struct nand_ecc_engine *eng,
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unsigned int direction,
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dma_addr_t dirmap)
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{
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return -EOPNOTSUPP;
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}
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#endif /* CONFIG_MTD_NAND_ECC_MXIC */
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#endif /* __MTD_NAND_ECC_MXIC_H__ */
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