linux-kernel - RE: [PATCH v2] pmem: fix a name collision

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Date:   Tue, 12 Jul 2022 17:53:05 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Jane Chu <jane.chu@...cle.com>, <dan.j.williams@...el.com>,
        <linux-kernel@...r.kernel.org>, <hch@....de>,
        <nvdimm@...ts.linux.dev>
Subject: RE: [PATCH v2] pmem: fix a name collision

Jane Chu wrote:
> Kernel test robot detected name collision when compiled on 'um'
> architecture.  Rename "to_phys()"  to "pmem_to_phys()".
> 
> >> drivers/nvdimm/pmem.c:48:20: error: conflicting types for 'to_phys'; have 'phys_addr_t(struct pmem_device *, phys_addr_t)' {aka 'long long unsigned int(struct pmem_device *, long long unsigned int)'}
>       48 | static phys_addr_t to_phys(struct pmem_device *pmem, phys_addr_t offset)
>          |                    ^~~~~~~
>    In file included from arch/um/include/asm/page.h:98,
>                     from arch/um/include/asm/thread_info.h:15,
>                     from include/linux/thread_info.h:60,
>                     from include/asm-generic/preempt.h:5,
>                     from ./arch/um/include/generated/asm/preempt.h:1,
> 
>    arch/um/include/shared/mem.h:12:29: note: previous definition of 'to_phys' with type 'long unsigned int(void *)'
>       12 | static inline unsigned long to_phys(void *virt)
>          |                             ^~~~~~~
> 
> vim +48 drivers/nvdimm/pmem.c
>     47
>   > 48	static phys_addr_t to_phys(struct pmem_device *pmem, phys_addr_t offset)
>     49	{
>     50		return pmem->phys_addr + offset;
>     51	}
>     52
> 
> Fixes: 9409c9b6709e (pmem: refactor pmem_clear_poison())
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Jane Chu <jane.chu@...cle.com>

Applied. Sorry for the delay, catching up after vacation.