[dpdk-dev] [PATCH v1] eal: use correct data type for slab operations

[Vivek Sharma]

+ dev.
+cristian(Bitmap maintainer)

Please review.

Thanks!

On Monday 24 September 2018 09:08 PM, Vivek Sharma wrote:
> Currently, slab operations use unsigned long data type for 64-bit slab
> related operations. On target 'i686-native-linuxapp-gcc', unsigned long
> is 32-bit and thus, slab operations breaks on this target. Changing slab
> operations to use unsigned long long for correct functioning on all targets.
> 
> Fixes: de3cfa2c9823 ("sched: initial import")
> Fixes: 693f715da45c ("remove extra parentheses in return statement")
> CC: stable at dpdk.org
> 
> Signed-off-by: Vivek Sharma <vivek.sharma at caviumnetworks.com>
> ---
>  lib/librte_eal/common/include/rte_bitmap.h | 14 +++++++-------
>  test/test/test_bitmap.c                    | 18 ++++++++++++++++++
>  2 files changed, 25 insertions(+), 7 deletions(-)
> 
> diff --git a/lib/librte_eal/common/include/rte_bitmap.h b/lib/librte_eal/common/include/rte_bitmap.h
> index d9facc6..7a36ce7 100644
> --- a/lib/librte_eal/common/include/rte_bitmap.h
> +++ b/lib/librte_eal/common/include/rte_bitmap.h
> @@ -88,7 +88,7 @@ __rte_bitmap_index1_inc(struct rte_bitmap *bmp)
>  static inline uint64_t
>  __rte_bitmap_mask1_get(struct rte_bitmap *bmp)
>  {
> -	return (~1lu) << bmp->offset1;
> +	return (~1llu) << bmp->offset1;
>  }
>  
>  static inline void
> @@ -317,7 +317,7 @@ rte_bitmap_get(struct rte_bitmap *bmp, uint32_t pos)
>  	index2 = pos >> RTE_BITMAP_SLAB_BIT_SIZE_LOG2;
>  	offset2 = pos & RTE_BITMAP_SLAB_BIT_MASK;
>  	slab2 = bmp->array2 + index2;
> -	return (*slab2) & (1lu << offset2);
> +	return (*slab2) & (1llu << offset2);
>  }
>  
>  /**
> @@ -342,8 +342,8 @@ rte_bitmap_set(struct rte_bitmap *bmp, uint32_t pos)
>  	slab2 = bmp->array2 + index2;
>  	slab1 = bmp->array1 + index1;
>  
> -	*slab2 |= 1lu << offset2;
> -	*slab1 |= 1lu << offset1;
> +	*slab2 |= 1llu << offset2;
> +	*slab1 |= 1llu << offset1;
>  }
>  
>  /**
> @@ -370,7 +370,7 @@ rte_bitmap_set_slab(struct rte_bitmap *bmp, uint32_t pos, uint64_t slab)
>  	slab1 = bmp->array1 + index1;
>  
>  	*slab2 |= slab;
> -	*slab1 |= 1lu << offset1;
> +	*slab1 |= 1llu << offset1;
>  }
>  
>  static inline uint64_t
> @@ -408,7 +408,7 @@ rte_bitmap_clear(struct rte_bitmap *bmp, uint32_t pos)
>  	slab2 = bmp->array2 + index2;
>  
>  	/* Return if array2 slab is not all-zeros */
> -	*slab2 &= ~(1lu << offset2);
> +	*slab2 &= ~(1llu << offset2);
>  	if (*slab2){
>  		return;
>  	}
> @@ -424,7 +424,7 @@ rte_bitmap_clear(struct rte_bitmap *bmp, uint32_t pos)
>  	index1 = pos >> (RTE_BITMAP_SLAB_BIT_SIZE_LOG2 + RTE_BITMAP_CL_BIT_SIZE_LOG2);
>  	offset1 = (pos >> RTE_BITMAP_CL_BIT_SIZE_LOG2) & RTE_BITMAP_SLAB_BIT_MASK;
>  	slab1 = bmp->array1 + index1;
> -	*slab1 &= ~(1lu << offset1);
> +	*slab1 &= ~(1llu << offset1);
>  
>  	return;
>  }
> diff --git a/test/test/test_bitmap.c b/test/test/test_bitmap.c
> index c3169e9..95c5184 100644
> --- a/test/test/test_bitmap.c
> +++ b/test/test/test_bitmap.c
> @@ -101,6 +101,7 @@ test_bitmap_slab_set_get(struct rte_bitmap *bmp)
>  static int
>  test_bitmap_set_get_clear(struct rte_bitmap *bmp)
>  {
> +	uint64_t val;
>  	int i;
>  
>  	rte_bitmap_reset(bmp);
> @@ -124,6 +125,23 @@ test_bitmap_set_get_clear(struct rte_bitmap *bmp)
>  		}
>  	}
>  
> +	rte_bitmap_reset(bmp);
> +
> +	/* Alternate slab set test */
> +	for (i = 0; i < MAX_BITS; i++) {
> +		if (i % RTE_BITMAP_SLAB_BIT_SIZE)
> +			rte_bitmap_set(bmp, i);
> +	}
> +
> +	for (i = 0; i < MAX_BITS; i++) {
> +		val = rte_bitmap_get(bmp, i);
> +		if (((i % RTE_BITMAP_SLAB_BIT_SIZE) && !val) ||
> +		    (!(i % RTE_BITMAP_SLAB_BIT_SIZE) && val)) {
> +			printf("Failed to get set bit.\n");
> +			return TEST_FAILED;
> +		}
> +	}
> +
>  	return TEST_SUCCESS;
>  }
>  
>