&a and &b are the address of the local stack variables, not the actual
structures.  Instead of comparing the fields of a and b, we compared
...some stack memory.

Not a candidate for stable since GS code doesn't exist in 9.2.

Signed-off-by: Kenneth Graunke <[email protected]>
---
 src/mesa/drivers/dri/i965/brw_vec4_gs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_gs.c 
b/src/mesa/drivers/dri/i965/brw_vec4_gs.c
index c526107..0219915 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_gs.c
+++ b/src/mesa/drivers/dri/i965/brw_vec4_gs.c
@@ -313,7 +313,7 @@ brw_gs_prog_data_compare(const void *in_a, const void *in_b,
 
    /* Compare the rest of the struct. */
    const unsigned offset = sizeof(struct brw_vec4_prog_data);
-   if (memcmp(((char *) &a) + offset, ((char *) &b) + offset,
+   if (memcmp(((char *) a) + offset, ((char *) b) + offset,
               sizeof(struct brw_gs_prog_data) - offset)) {
       return false;
    }
-- 
1.8.3.4

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