Re: [dpdk-dev] [PATCH v2] Fix two compile issues with i686 platform

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

On Wed, Dec 03, 2014 at 04:10:23PM +0800, Michael Qiu wrote:
> lib/librte_eal/linuxapp/eal/eal_memory.c:324:4: error: comparison
> is always false due to limited range of data type [-Werror=type-limits]
>     || (hugepage_sz == RTE_PGSIZE_16G)) {
>     ^
> cc1: all warnings being treated as errors
> 
> lib/librte_eal/linuxapp/eal/eal.c(461): error #2259: non-pointer
> conversion from "long long" to "void *" may lose significant bits
>    RTE_PTR_ALIGN_CEIL((uintptr_t)addr, RTE_PGSIZE_16M);
> 
> This was introuduced by commit b77b5639:
>         mem: add huge page sizes for IBM Power
> 
> The root cause is that size_t and uintptr_t are 32-bit in i686
> platform, but RTE_PGSIZE_16M and RTE_PGSIZE_16G are always 64-bit.
> 
> Define RTE_PGSIZE_16G only in 64 bit platform to avoid
> this issue.
> 
> Signed-off-by: Michael Qiu <michael.qiu@intel.com>
Minor comment below.

Acked-by: Bruce Richardson <bruce.richardson@intel.com>

> ---
>  app/test/test_memzone.c                    | 18 ++++++++++++------
>  lib/librte_eal/common/eal_common_memzone.c |  2 ++
>  lib/librte_eal/common/include/rte_memory.h | 14 ++++++++------
>  lib/librte_eal/linuxapp/eal/eal_memory.c   | 12 +++++-------
>  4 files changed, 27 insertions(+), 19 deletions(-)
> 
... snip ...
> --- a/lib/librte_eal/common/include/rte_memory.h
> +++ b/lib/librte_eal/common/include/rte_memory.h
> @@ -53,12 +53,14 @@ extern "C" {
>  #endif
>  
>  enum rte_page_sizes {
> -	RTE_PGSIZE_4K = 1ULL << 12,
> -	RTE_PGSIZE_2M = 1ULL << 21,
> -	RTE_PGSIZE_1G = 1ULL << 30,
> -	RTE_PGSIZE_64K = 1ULL << 16,
> -	RTE_PGSIZE_16M = 1ULL << 24,
> -	RTE_PGSIZE_16G = 1ULL << 34
> +	RTE_PGSIZE_4K	= 1UL << 12,
> +	RTE_PGSIZE_2M	= 1UL << 21,
> +	RTE_PGSIZE_1G	= 1UL << 30,
> +	RTE_PGSIZE_64K	= 1UL << 16,
> +	RTE_PGSIZE_16M	= 1UL << 24,
> +#ifdef RTE_ARCH_64
> +	RTE_PGSIZE_16G	= 1ULL << 34
you don't need the "LL" here as long type is 64-bits on 64-bit systems. Changing
it to 1UL << 34 will keep all entries consistent.