Subject: mainline build failure due to c1918196427b ("iwlwifi: pcie: simplify MSI-X cause mapping")

From: Sudip Mukherjee <[email-masked]>
Date: Fri, 27 May 2022 10:13:06 +0100

Hi All,

The latest mainline kernel branch fails to build for mips allmodconfig
with the error:

drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1093: error: "CAUSE" redefined [-Werror]
 1093 | #define CAUSE(reg, mask)                                                \
      | 
In file included from ./arch/mips/include/asm/ptrace.h:19,
                 from ./include/linux/sched/signal.h:14,
                 from ./include/linux/rcuwait.h:6,
                 from ./include/linux/percpu-rwsem.h:7,
                 from ./include/linux/fs.h:33,
                 from ./arch/mips/include/asm/elf.h:12,
                 from ./include/linux/elf.h:6,
                 from ./include/linux/module.h:19,
                 from ./include/linux/device/driver.h:21,
                 from ./include/linux/device.h:32,
                 from ./include/linux/pci.h:37,
                 from drivers/net/wireless/intel/iwlwifi/pcie/trans.c:7:
./arch/mips/include/uapi/asm/ptrace.h:18: note: this is the location of the previous definition
   18 | #define CAUSE           65

git bisect pointed to c1918196427b ("iwlwifi: pcie: simplify MSI-X cause mapping")

And, reverting it on top of mainline branch has fixed the build failure.

--
Regards
Sudip