kernel/dma/pool.c:105:9: error: call to undeclared function 'pgprot_dmacoherent'; ISO C99 and later do not support implicit function declarations
From: kernel test robot
Date: Sat Aug 13 2022 - 08:41:18 EST
Hi Heiko,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 69dac8e431af26173ca0a1ebc87054e01c585bcc
commit: 1631ba1259d6d7f49b6028f2a1a0fa02be1c522a riscv: Add support for non-coherent devices using zicbom extension
date: 2 weeks ago
config: riscv-randconfig-r031-20220812 (https://download.01.org/0day-ci/archive/20220813/202208132019.8G3q7EhQ-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 3329cec2f79185bafd678f310fafadba2a8c76d2)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1631ba1259d6d7f49b6028f2a1a0fa02be1c522a
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 1631ba1259d6d7f49b6028f2a1a0fa02be1c522a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash kernel/dma/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
In file included from kernel/dma/pool.c:8:
In file included from include/linux/dma-map-ops.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from kernel/dma/pool.c:8:
In file included from include/linux/dma-map-ops.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from kernel/dma/pool.c:8:
In file included from include/linux/dma-map-ops.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> kernel/dma/pool.c:105:9: error: call to undeclared function 'pgprot_dmacoherent'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
pgprot_dmacoherent(PAGE_KERNEL),
^
>> kernel/dma/pool.c:105:9: error: passing 'int' to parameter of incompatible type 'pgprot_t'
pgprot_dmacoherent(PAGE_KERNEL),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/dma-map-ops.h:235:76: note: passing argument to parameter 'prot' here
void *dma_common_contiguous_remap(struct page *page, size_t size, pgprot_t prot,
^
7 warnings and 2 errors generated.
vim +/pgprot_dmacoherent +105 kernel/dma/pool.c
d7e673ec2c8e0e Nicolas Saenz Julienne 2020-08-14 78
54adadf9b08571 David Rientjes 2020-04-20 79 static int atomic_pool_expand(struct gen_pool *pool, size_t pool_size,
54adadf9b08571 David Rientjes 2020-04-20 80 gfp_t gfp)
e860c299ac0d73 David Rientjes 2020-04-14 81 {
54adadf9b08571 David Rientjes 2020-04-20 82 unsigned int order;
892fc9f6835ecf Dan Carpenter 2020-08-26 83 struct page *page = NULL;
e860c299ac0d73 David Rientjes 2020-04-14 84 void *addr;
54adadf9b08571 David Rientjes 2020-04-20 85 int ret = -ENOMEM;
54adadf9b08571 David Rientjes 2020-04-20 86
54adadf9b08571 David Rientjes 2020-04-20 87 /* Cannot allocate larger than MAX_ORDER-1 */
54adadf9b08571 David Rientjes 2020-04-20 88 order = min(get_order(pool_size), MAX_ORDER-1);
54adadf9b08571 David Rientjes 2020-04-20 89
54adadf9b08571 David Rientjes 2020-04-20 90 do {
54adadf9b08571 David Rientjes 2020-04-20 91 pool_size = 1 << (PAGE_SHIFT + order);
d7e673ec2c8e0e Nicolas Saenz Julienne 2020-08-14 92 if (cma_in_zone(gfp))
d7e673ec2c8e0e Nicolas Saenz Julienne 2020-08-14 93 page = dma_alloc_from_contiguous(NULL, 1 << order,
d7e673ec2c8e0e Nicolas Saenz Julienne 2020-08-14 94 order, false);
d7e673ec2c8e0e Nicolas Saenz Julienne 2020-08-14 95 if (!page)
c84dc6e68a1d24 David Rientjes 2020-04-14 96 page = alloc_pages(gfp, order);
54adadf9b08571 David Rientjes 2020-04-20 97 } while (!page && order-- > 0);
e860c299ac0d73 David Rientjes 2020-04-14 98 if (!page)
e860c299ac0d73 David Rientjes 2020-04-14 99 goto out;
e860c299ac0d73 David Rientjes 2020-04-14 100
c84dc6e68a1d24 David Rientjes 2020-04-14 101 arch_dma_prep_coherent(page, pool_size);
e860c299ac0d73 David Rientjes 2020-04-14 102
76a19940bd62a8 David Rientjes 2020-04-14 103 #ifdef CONFIG_DMA_DIRECT_REMAP
c84dc6e68a1d24 David Rientjes 2020-04-14 104 addr = dma_common_contiguous_remap(page, pool_size,
e860c299ac0d73 David Rientjes 2020-04-14 @105 pgprot_dmacoherent(PAGE_KERNEL),
e860c299ac0d73 David Rientjes 2020-04-14 106 __builtin_return_address(0));
e860c299ac0d73 David Rientjes 2020-04-14 107 if (!addr)
54adadf9b08571 David Rientjes 2020-04-20 108 goto free_page;
76a19940bd62a8 David Rientjes 2020-04-14 109 #else
76a19940bd62a8 David Rientjes 2020-04-14 110 addr = page_to_virt(page);
76a19940bd62a8 David Rientjes 2020-04-14 111 #endif
76a19940bd62a8 David Rientjes 2020-04-14 112 /*
76a19940bd62a8 David Rientjes 2020-04-14 113 * Memory in the atomic DMA pools must be unencrypted, the pools do not
2f5388a29be82a Christoph Hellwig 2020-08-17 114 * shrink so no re-encryption occurs in dma_direct_free().
76a19940bd62a8 David Rientjes 2020-04-14 115 */
76a19940bd62a8 David Rientjes 2020-04-14 116 ret = set_memory_decrypted((unsigned long)page_to_virt(page),
76a19940bd62a8 David Rientjes 2020-04-14 117 1 << order);
76a19940bd62a8 David Rientjes 2020-04-14 118 if (ret)
76a19940bd62a8 David Rientjes 2020-04-14 119 goto remove_mapping;
54adadf9b08571 David Rientjes 2020-04-20 120 ret = gen_pool_add_virt(pool, (unsigned long)addr, page_to_phys(page),
54adadf9b08571 David Rientjes 2020-04-20 121 pool_size, NUMA_NO_NODE);
e860c299ac0d73 David Rientjes 2020-04-14 122 if (ret)
76a19940bd62a8 David Rientjes 2020-04-14 123 goto encrypt_mapping;
e860c299ac0d73 David Rientjes 2020-04-14 124
2edc5bb3c5cc42 David Rientjes 2020-04-14 125 dma_atomic_pool_size_add(gfp, pool_size);
e860c299ac0d73 David Rientjes 2020-04-14 126 return 0;
e860c299ac0d73 David Rientjes 2020-04-14 127
76a19940bd62a8 David Rientjes 2020-04-14 128 encrypt_mapping:
76a19940bd62a8 David Rientjes 2020-04-14 129 ret = set_memory_encrypted((unsigned long)page_to_virt(page),
76a19940bd62a8 David Rientjes 2020-04-14 130 1 << order);
76a19940bd62a8 David Rientjes 2020-04-14 131 if (WARN_ON_ONCE(ret)) {
76a19940bd62a8 David Rientjes 2020-04-14 132 /* Decrypt succeeded but encrypt failed, purposely leak */
76a19940bd62a8 David Rientjes 2020-04-14 133 goto out;
76a19940bd62a8 David Rientjes 2020-04-14 134 }
e860c299ac0d73 David Rientjes 2020-04-14 135 remove_mapping:
76a19940bd62a8 David Rientjes 2020-04-14 136 #ifdef CONFIG_DMA_DIRECT_REMAP
c84dc6e68a1d24 David Rientjes 2020-04-14 137 dma_common_free_remap(addr, pool_size);
76a19940bd62a8 David Rientjes 2020-04-14 138 #endif
76a19940bd62a8 David Rientjes 2020-04-14 139 free_page: __maybe_unused
c84dc6e68a1d24 David Rientjes 2020-04-14 140 __free_pages(page, order);
e860c299ac0d73 David Rientjes 2020-04-14 141 out:
54adadf9b08571 David Rientjes 2020-04-20 142 return ret;
54adadf9b08571 David Rientjes 2020-04-20 143 }
54adadf9b08571 David Rientjes 2020-04-20 144
:::::: The code at line 105 was first introduced by commit
:::::: e860c299ac0d738b44ff91693f11e63080a29698 dma-remap: separate DMA atomic pools from direct remap code
:::::: TO: David Rientjes <rientjes@xxxxxxxxxx>
:::::: CC: Christoph Hellwig <hch@xxxxxx>
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