On 2020/5/14 11:47, Zong Li wrote:
On Thu, May 14, 2020 at 9:07 AM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
On Sat, 9 May 2020 18:46:50 +0800 kbuild test robot <lkp@xxxxxxxxx> wrote:
Hi Zong,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 30e2206e11ce27ae910cc0dab21472429e400a87
commit: c0eba2d72e70b4208ca6fd82820ba7428090e350 [7592/7905] riscv: support DEBUG_WX
config: riscv-randconfig-r003-20200509 (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout c0eba2d72e70b4208ca6fd82820ba7428090e350
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=riscv
If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
All error/warnings (new ones prefixed by >>):
arch/riscv/mm/ptdump.c:57:3: error: 'FIXADDR_START' undeclared here (not in a function); did you mean 'XAS_RESTART'?
57 | {FIXADDR_START, "Fixmap start"},
| ^~~~~~~~~~~~~
| XAS_RESTART
argh, I can't figure out how to make riscv compile :(
Are you using the riscv32 toolchain or riscv64?
And arch/riscv/include/asm/perf_event.h does
#ifdef CONFIG_RISCV_BASE_PMU
#define RISCV_MAX_COUNTERS 2
#endif
#ifndef RISCV_MAX_COUNTERS
#error "Please provide a valid RISCV_MAX_COUNTERS for the PMU."
#endif
where is RISCV_MAX_COUNTERS supposed to come from? Surely this should
be implemented in Kconfig somehow?
Sigh. Zong, did you take a look at this?
Yes, I had taken a look at that, the problem is that the .config
selects CONFIG_PERF_EVENTS, but doesn't select CONFIG_RISCV_BASE_PMU
together. It seems to me that it is a bug of perf porting on RISC-V,
CONFIG_RISCV_BASE_PMU could be selected or unselected, but in fact,
CONFIG_RISCV_BASE_PMU must be always selected when selecting
CONFIG_PERF_EVENTS on RISC-V perf implementation. Maybe let me send a
patch to fix it.
Hi Andrew and Zong, I have sent some fix patches, and Palmer accept
them.
https://lore.kernel.org/linux-riscv/mhng-d7e9b8e8-2c97-490b-9eac-fd88c7a5a34d@palmerdabbelt-glaptop1/T/#t
