[dpdk-dev] [PATCH 2/6] eal/linux: remove useless casts

[David Marchand]

Rather than cast the huge pages number returned by get_num_hugepages, rework
this function so that it returns 0 when something goes wrong.
And no need for casts in log.

Signed-off-by: David Marchand <david.marchand at 6wind.com>
---
 lib/librte_eal/linuxapp/eal/eal_hugepage_info.c |   21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c b/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c
index 6dd8a0b..0b6ece7 100644
--- a/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c
+++ b/lib/librte_eal/linuxapp/eal/eal_hugepage_info.c
@@ -63,7 +63,7 @@ static const char sys_dir_path[] = "/sys/kernel/mm/hugepages";
 
 /* this function is only called from eal_hugepage_info_init which itself
  * is only called from a primary process */
-static int32_t
+static unsigned long
 get_num_hugepages(const char *subdir)
 {
 	char path[PATH_MAX];
@@ -87,10 +87,12 @@ get_num_hugepages(const char *subdir)
 				subdir);
 
 	/* adjust num_pages */
-	if (num_pages > 0)
+	if (num_pages >= resv_pages)
 		num_pages -= resv_pages;
+	else if (resv_pages)
+		num_pages = 0;
 
-	return (int32_t)num_pages;
+	return num_pages;
 }
 
 static uint64_t
@@ -288,12 +290,13 @@ eal_hugepage_info_init(void)
 
 			/* first, check if we have a mountpoint */
 			if (hpi->hugedir == NULL){
-				int32_t num_pages;
-				if ((num_pages = get_num_hugepages(dirent->d_name)) > 0)
-					RTE_LOG(INFO, EAL, "%u hugepages of size %llu reserved, "\
-							"but no mounted hugetlbfs found for that size\n",
-							(unsigned)num_pages,
-							(unsigned long long)hpi->hugepage_sz);
+				unsigned long num_pages;
+
+				num_pages = get_num_hugepages(dirent->d_name);
+				if (num_pages > 0)
+					RTE_LOG(INFO, EAL, "%lu hugepages of size %lu reserved, "
+						"but no mounted hugetlbfs found for that size\n",
+						num_pages, hpi->hugepage_sz);
 			} else {
 				/* try to obtain a writelock */
 				hpi->lock_descriptor = open(hpi->hugedir, O_RDONLY);
-- 
1.7.10.4