[PATCH 1/4] drm/amd/display: Fix __umoddi3 undefined for 32 bit compilation

[Rodrigo Siqueira]

While we tried to build amdgpu on i386, we got this error:

ERROR: modpost: "__umoddi3" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!

This commit fixes this issue by replacing the standard module operator
with div_u64_rem.

Cc: Aurabindo Pillai <aurabindo.pillai at amd.com>
Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: Randy Dunlap <rdunlap at infradead.org>
Fixes: 9b0e0d433f74 ("drm/amd/display: Add dependant changes for DCN32/321")
Reported-by: Stephen Rothwell <sfr at canb.auug.org.au>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
index a10ec5919194..790aa2b3952c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
@@ -208,12 +208,14 @@ static uint32_t dcn32_cache_lines_for_surface(struct dc *dc, uint32_t surface_si
 	uint32_t num_cached_bytes = 0;
 	uint32_t remaining_size = 0;
 	uint32_t cache_line_size = dc->caps.cache_line_size;
+	uint32_t remainder = 0;
 
 	/* 1. Calculate surface size minus the number of bytes stored
 	 * in the first cache line (all bytes in first cache line might
 	 * not be fully used).
 	 */
-	num_cached_bytes = cache_line_size - (start_address % cache_line_size);
+	div_u64_rem(start_address, cache_line_size, &remainder);
+	num_cached_bytes = cache_line_size - remainder;
 	remaining_size = surface_size - num_cached_bytes;
 
 	/* 2. Calculate number of cache lines that will be fully used with
-- 
2.25.1