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Message-ID: <202204240640.NsKCxxv9-lkp@intel.com>
Date: Sun, 24 Apr 2022 06:07:08 +0800
From: kernel test robot <lkp@...el.com>
To: Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org, Vinod Koul <vkoul@...nel.org>
Subject: drivers/dma/dw-edma/dw-edma-v0-core.c:192:19: warning: unused
function 'readq_ch'
Hi Gustavo,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 13bc32bad7059d6c5671e9d037e6e3ed001cc0f4
commit: e0c1d53891c43a70c9fa85ddb3174ab5afd7e2ec dmaengine: dw-edma: Add support for the HDMA feature
date: 1 year, 1 month ago
config: mips-randconfig-r032-20220424 (https://download.01.org/0day-ci/archive/20220424/202204240640.NsKCxxv9-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 1cddcfdc3c683b393df1a5c9063252eb60e52818)
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 mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e0c1d53891c43a70c9fa85ddb3174ab5afd7e2ec
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout e0c1d53891c43a70c9fa85ddb3174ab5afd7e2ec
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/dma/dw-edma/ drivers/usb/gadget/ fs/overlayfs/ kernel/bpf/ sound/core/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> drivers/dma/dw-edma/dw-edma-v0-core.c:192:19: warning: unused function 'readq_ch'
static inline u64 readq_ch(struct dw_edma enum dw_edma_dir dir, u16 ch,
^
fatal error: error in backend: Nested variants found in inline asm string: '.if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/barrier.h", .line = 16, $); 0x00 ) != -1)) : $))) ) && ( (1 << 0) ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif'
clang-15: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 15.0.0 (git://gitmirror/llvm_project 1cddcfdc3c683b393df1a5c9063252eb60e52818)
Target: mips64el-unknown-linux
Thread model: posix
InstalledDir: /opt/cross/clang-1cddcfdc3c/bin
clang-15: note: diagnostic msg:
Makefile arch block drivers fs include kernel mm nr_bisected scripts sound source usr virt
vim +/readq_ch +192 drivers/dma/dw-edma/dw-edma-v0-core.c
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 191
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 @192 static inline u64 readq_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch,
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 193 const void __iomem *addr)
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 194 {
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 195 u32 value;
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 196
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 197 if (dw->mf == EDMA_MF_EDMA_LEGACY) {
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 198 u32 viewport_sel;
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 199 unsigned long flags;
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 200
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 201 raw_spin_lock_irqsave(&dw->lock, flags);
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 202
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 203 viewport_sel = FIELD_PREP(EDMA_V0_VIEWPORT_MASK, ch);
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 204 if (dir == EDMA_DIR_READ)
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 205 viewport_sel |= BIT(31);
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 206
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 207 writel(viewport_sel,
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 208 &(__dw_regs(dw)->type.legacy.viewport_sel));
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 209 value = readq(addr);
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 210
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 211 raw_spin_unlock_irqrestore(&dw->lock, flags);
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 212 } else {
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 213 value = readq(addr);
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 214 }
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 215
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 216 return value;
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 217 }
04e0a39fc10f82 Gustavo Pimentel 2021-02-18 218
:::::: The code at line 192 was first introduced by commit
:::::: 04e0a39fc10f82a71b84af73351333b184cee578 dmaengine: dw-edma: Add writeq() and readq() for 64 bits architectures
:::::: TO: Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>
:::::: CC: Vinod Koul <vkoul@...nel.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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