In support of the CXL subsystem's use of 'struct range' to track decode
address ranges, add a common range_contains() implementation with
identical semantics as resource_contains();
The existing 'range_contains()' in lib/stackinit_kunit.c is namespaced
with a 'stackinit_' prefix.
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
drivers/cxl/core/pci.c | 5 -----
include/linux/range.h | 5 +++++
lib/stackinit_kunit.c | 6 +++---
3 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
index 1d1492440287..9ed2120dbf8a 100644
--- a/drivers/cxl/core/pci.c
+++ b/drivers/cxl/core/pci.c
@@ -214,11 +214,6 @@ static int devm_cxl_enable_mem(struct device *host, struct cxl_dev_state *cxlds)
return devm_add_action_or_reset(host, clear_mem_enable, cxlds);
}
-static bool range_contains(struct range *r1, struct range *r2)
-{
- return r1->start <= r2->start && r1->end >= r2->end;
-}
-
/* require dvsec ranges to be covered by a locked platform window */
static int dvsec_range_allowed(struct device *dev, void *arg)
{
diff --git a/include/linux/range.h b/include/linux/range.h
index 274681cc3154..7efb6a9b069b 100644
--- a/include/linux/range.h
+++ b/include/linux/range.h
@@ -13,6 +13,11 @@ static inline u64 range_len(const struct range *range)
return range->end - range->start + 1;
}
+static inline bool range_contains(struct range *r1, struct range *r2)
+{
+ return r1->start <= r2->start && r1->end >= r2->end;
+}
+
int add_range(struct range *range, int az, int nr_range,
u64 start, u64 end);
diff --git a/lib/stackinit_kunit.c b/lib/stackinit_kunit.c
index 4591d6cf5e01..05947a2feb93 100644
--- a/lib/stackinit_kunit.c
+++ b/lib/stackinit_kunit.c
@@ -31,8 +31,8 @@ static volatile u8 forced_mask = 0xff;
static void *fill_start, *target_start;
static size_t fill_size, target_size;
-static bool range_contains(char *haystack_start, size_t haystack_size,
- char *needle_start, size_t needle_size)
+static bool stackinit_range_contains(char *haystack_start, size_t haystack_size,
+ char *needle_start, size_t needle_size)
{
if (needle_start >= haystack_start &&
needle_start + needle_size <= haystack_start + haystack_size)
@@ -175,7 +175,7 @@ static noinline void test_ ## name (struct kunit *test) \
\
/* Validate that compiler lined up fill and target. */ \
KUNIT_ASSERT_TRUE_MSG(test, \
- range_contains(fill_start, fill_size, \
+ stackinit_range_contains(fill_start, fill_size, \
target_start, target_size), \
"stack fill missed target!? " \
"(fill %zu wide, target offset by %d)\n", \
