linux-kernel - [PATCH -next] drm/panthor: Use the BITS_PER

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Message-ID: <20240831024532.455361-1-ruanjinjie@huawei.com>
Date: Sat, 31 Aug 2024 10:45:31 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <boris.brezillon@...labora.com>, <steven.price@....com>,
	<liviu.dudau@....com>, <maarten.lankhorst@...ux.intel.com>,
	<mripard@...nel.org>, <tzimmermann@...e.de>, <airlied@...il.com>,
	<daniel@...ll.ch>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH -next] drm/panthor: Use the BITS_PER_LONG macro

sizeof(unsigned long) * 8 is the number of bits in an unsigned long
variable, replace it with BITS_PER_LONG macro to make them simpler.

And fix the warning:
	WARNING: Comparisons should place the constant on the right side of the test
	#23: FILE: drivers/gpu/drm/panthor/panthor_mmu.c:2696:
	+       if (BITS_PER_LONG < va_bits) {

Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 drivers/gpu/drm/panthor/panthor_mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c
index d47972806d50..2a0c46391374 100644
--- a/drivers/gpu/drm/panthor/panthor_mmu.c
+++ b/drivers/gpu/drm/panthor/panthor_mmu.c
@@ -2693,7 +2693,7 @@ int panthor_mmu_init(struct panthor_device *ptdev)
 	 * which passes iova as an unsigned long. Patch the mmu_features to reflect this
 	 * limitation.
 	 */
-	if (sizeof(unsigned long) * 8 < va_bits) {
+	if (va_bits > BITS_PER_LONG) {
 		ptdev->gpu_info.mmu_features &= ~GENMASK(7, 0);
 		ptdev->gpu_info.mmu_features |= sizeof(unsigned long) * 8;
 	}
-- 
2.34.1