Hi Marc,
On 21/09/18 20:59, Marc Zyngier wrote:
LPI_PENDING_SZ is always used in conjunction with a max(). Let's
factor this in the definition of the macro, and simplify the rest
of the code.
Signed-off-by: Marc Zyngier <[email protected]>
---
drivers/irqchip/irq-gic-v3-its.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index c2df341ff6fa..ed6aab11e019 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -62,7 +62,7 @@ static u32 lpi_id_bits;
*/
#define LPI_NRBITS lpi_id_bits
#define LPI_PROPBASE_SZ ALIGN(BIT(LPI_NRBITS), SZ_64K)
-#define LPI_PENDBASE_SZ ALIGN(BIT(LPI_NRBITS) / 8, SZ_64K)
+#define LPI_PENDBASE_SZ max_t(u32, SZ_64K,
ALIGN(BIT(LPI_NRBITS) / 8, SZ_64K))
minor nit: The ALIGN() already aligns the given value up to the required
alignment. So, if the LPI_NRBITS is guaranteed to be non-zero,
we could simply drop the max_t().
Rest looks good to me.
Suzuki
#define LPI_PROP_DEFAULT_PRIO 0xa0
@@ -1924,12 +1924,9 @@ static int its_alloc_collections(struct its_node *its)
static struct page *its_allocate_pending_table(gfp_t gfp_flags)
{
struct page *pend_page;
- /*
- * The pending pages have to be at least 64kB aligned,
- * hence the 'max(LPI_PENDBASE_SZ, SZ_64K)' below.
- */
+
pend_page = alloc_pages(gfp_flags | __GFP_ZERO,
- get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K)));
+ get_order(LPI_PENDBASE_SZ));
if (!pend_page)
return NULL;
@@ -1941,8 +1938,7 @@ static struct page *its_allocate_pending_table(gfp_t gfp_flags)
static void its_free_pending_table(struct page *pt)
{
- free_pages((unsigned long)page_address(pt),
- get_order(max_t(u32, LPI_PENDBASE_SZ, SZ_64K)));
+ free_pages((unsigned long)page_address(pt), get_order(LPI_PENDBASE_SZ));
}
static void its_cpu_init_lpis(void)
