Re: [dpdk-dev] [PATCH 2/7] pci/vfio: improve musl compatibility

[Bruce Richardson <bruce.richardson@intel.com>]

On Wed, Aug 29, 2018 at 12:56:16PM +0100, Anatoly Burakov wrote:
> Musl already has PAGE_SIZE defined, and our define clashed with it.
> Rename our define to SYS_PAGE_SIZE.
> 
> Bugzilla ID: 36
> 
> Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
> ---

Would it not be easier to just do?

#ifndef PAGE_SIZE
#define PAGE_SIZE ...
#endif
>  drivers/bus/pci/linux/pci_vfio.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/bus/pci/linux/pci_vfio.c b/drivers/bus/pci/linux/pci_vfio.c
> index 686386d6a..88bcfb88b 100644
> --- a/drivers/bus/pci/linux/pci_vfio.c
> +++ b/drivers/bus/pci/linux/pci_vfio.c
> @@ -35,8 +35,8 @@
>  
>  #ifdef VFIO_PRESENT
>  
> -#define PAGE_SIZE   (sysconf(_SC_PAGESIZE))
> -#define PAGE_MASK   (~(PAGE_SIZE - 1))
> +#define SYS_PAGE_SIZE   (sysconf(_SC_PAGESIZE))
> +#define SYS_PAGE_MASK   (~(SYS_PAGE_SIZE - 1))
>  
>  static struct rte_tailq_elem rte_vfio_tailq = {
>  	.name = "VFIO_RESOURCE_LIST",
> @@ -344,8 +344,8 @@ pci_vfio_mmap_bar(int vfio_dev_fd, struct mapped_pci_resource *vfio_res,
>  		 */
>  		uint32_t table_start = msix_table->offset;
>  		uint32_t table_end = table_start + msix_table->size;
> -		table_end = (table_end + ~PAGE_MASK) & PAGE_MASK;
> -		table_start &= PAGE_MASK;
> +		table_end = (table_end + ~SYS_PAGE_MASK) & SYS_PAGE_MASK;
> +		table_start &= SYS_PAGE_MASK;
>  
>  		if (table_start == 0 && table_end >= bar->size) {
>  			/* Cannot map this BAR */
> -- 
> 2.17.1