[coreboot-gerrit] Change in coreboot[master]: memrange: Add a helper function to determine if memranges is empty

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/39485 )

Change subject: memrange: Add a helper function to determine if memranges is empty
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memrange: Add a helper function to determine if memranges is empty

This change adds a helper function memranges_is_empty() which returns
true if there are no entries in memranges.

BUG=b:149186922

Signed-off-by: Furquan Shaikh 
Change-Id: If841c42a9722cbc73ef321568928bc175bf88fd5
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39485
Tested-by: build bot (Jenkins) 
Reviewed-by: Patrick Georgi 
---
M src/include/memrange.h
1 file changed, 5 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Patrick Georgi: Looks good to me, approved

diff --git a/src/include/memrange.h b/src/include/memrange.h
index f8fa033..ea3b118 100644
--- a/src/include/memrange.h
+++ b/src/include/memrange.h
@@ -81,6 +81,11 @@
    r->tag = new_tag;
 }

+static inline bool memranges_is_empty(struct memranges *ranges)
+{
+	return ranges->entries == NULL;
+}
+
 /* Iterate over each entry in a memranges structure. Ranges cannot
  * be deleted while processing each entry as the list cannot be safely
  * traversed after such an operation.