linux-kernel - [PATCH v5 1/3] drm: i915: Change fault type to unsigned long

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Message-Id: <20241014151340.1639555-2-vincenzo.frascino@arm.com>
Date: Mon, 14 Oct 2024 16:13:38 +0100
From: Vincenzo Frascino <vincenzo.frascino@....com>
To: linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org,
	linux-mm@...ck.org
Cc: Vincenzo Frascino <vincenzo.frascino@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Andy Lutomirski <luto@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Jason A . Donenfeld" <Jason@...c4.com>
Subject: [PATCH v5 1/3] drm: i915: Change fault type to unsigned long

Fault is currently of type u32 and with the introduction of the
generalized vdso/page.h we trigger the error below:

drivers/gpu/drm/i915/gt/intel_gt_print.h:29:36: error: format ‘%lx’ expects
argument of type ‘long unsigned int’, but argument 6 has type ‘u32’ {aka
‘unsigned int’} [-Werror=format=]
   29 |         drm_dbg(&(_gt)->i915->drm, "GT%u: " _fmt, (_gt)->info.id,
      |                                    ^~~~~~~~
include/drm/drm_print.h:424:39: note: in definition of macro ‘drm_dev_dbg’
  424 |         __drm_dev_dbg(NULL, dev, cat, fmt, ##__VA_ARGS__)
      |                                       ^~~
include/drm/drm_print.h:524:33: note: in expansion of macro ‘drm_dbg_driver’
  524 | #define drm_dbg(drm, fmt, ...)  drm_dbg_driver(drm, fmt, ##__VA_ARGS__)
      |                                 ^~~~~~~~~~~~~~
linux/drivers/gpu/drm/i915/gt/intel_gt_print.h:29:9: note: in expansion of macro
‘drm_dbg’
   29 |         drm_dbg(&(_gt)->i915->drm, "GT%u: " _fmt, (_gt)->info.id,
      |         ^~~~~~~
drivers/gpu/drm/i915/gt/intel_gt.c:310:25: note: in expansion of macro ‘gt_dbg’
  310 |                         gt_dbg(gt, "Unexpected fault\n"
      |                         ^~~~~~

This happens because the type of PAGE_MASK depends on the architecture.

Prevent the compilation error changing the 'fault' type to unsigned
long.

Cc: Arnd Bergmann <arnd@...db.de>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Jason A. Donenfeld <Jason@...c4.com>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
---
 drivers/gpu/drm/i915/gt/intel_gt.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index a6c69a706fd7..bb29f361110e 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -302,7 +302,7 @@ static void gen6_check_faults(struct intel_gt *gt)
 {
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
-	u32 fault;
+	unsigned long fault;
 
 	for_each_engine(engine, gt, id) {
 		fault = GEN6_RING_FAULT_REG_READ(engine);
@@ -310,8 +310,8 @@ static void gen6_check_faults(struct intel_gt *gt)
 			gt_dbg(gt, "Unexpected fault\n"
 			       "\tAddr: 0x%08lx\n"
 			       "\tAddress space: %s\n"
-			       "\tSource ID: %d\n"
-			       "\tType: %d\n",
+			       "\tSource ID: %ld\n"
+			       "\tType: %ld\n",
 			       fault & PAGE_MASK,
 			       fault & RING_FAULT_GTTSEL_MASK ?
 			       "GGTT" : "PPGTT",
-- 
2.34.1