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authorVladimir Murzin <vladimir.murzin@arm.com>2016-11-02 11:54:04 +0000
committerMarc Zyngier <marc.zyngier@arm.com>2016-11-29 09:14:48 +0000
commitd524eaa2a8c08efcdf905acf07cfa770e481ca6b (patch)
tree20f3442799a492793f52d29032b1280b9691e756 /drivers/irqchip
parentb11283eb89b0697984cadee6016dabbcf511af27 (diff)
downloadlinux-d524eaa2a8c08efcdf905acf07cfa770e481ca6b.tar.bz2
irqchip/gic-v3-its: Narrow down Entry Size when used as a divider
GITS_BASER<n>'s Entry Size is much smaller than 64-bit, but when it used as a divider it forces compiler to generate __aeabi_uldivmod if build in 32-bit mode. So, casting it to int (like it is done in other places) where used as a divider would give a hint to compiler that 32-bit division can be used. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic-v3-its.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index bca125e6c8e8..312dd55dfaae 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -948,7 +948,7 @@ retry_baser:
tmp = indirect ? GITS_LVL1_ENTRY_SIZE : esz;
pr_info("ITS@%pa: allocated %d %s @%lx (%s, esz %d, psz %dK, shr %d)\n",
- &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / tmp),
+ &its->phys_base, (int)(PAGE_ORDER_TO_SIZE(order) / (int)tmp),
its_base_type_string[type],
(unsigned long)virt_to_phys(base),
indirect ? "indirect" : "flat", (int)esz,
@@ -983,7 +983,7 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser
* which is reported by ITS hardware times lvl1 table
* entry size.
*/
- ids -= ilog2(psz / esz);
+ ids -= ilog2(psz / (int)esz);
esz = GITS_LVL1_ENTRY_SIZE;
}
}
@@ -998,7 +998,7 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser
new_order = max_t(u32, get_order(esz << ids), new_order);
if (new_order >= MAX_ORDER) {
new_order = MAX_ORDER - 1;
- ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / esz);
+ ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz);
pr_warn("ITS@%pa: Device Table too large, reduce ids %u->%u\n",
&its->phys_base, its->device_ids, ids);
}