tests/pdx: define PAGE_SIZE as long

Otherwise Coverity complains about possibly shifting an integer more than
31 bits.

This also reverts the previous attempt to fix this Coverity reported
issue, commit 4dd3230290.

Suggested-by: Jan Beulich <jbeulich@suse.com>
Coverity ID: 1662707
Fixes: cb50e40337 ('test/pdx: add PDX compression unit tests')
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

tools/tests/pdx/harness.h

@@ -33,7 +33,7 @@
 #define PAGE_SHIFT    12
 /* Some libcs define PAGE_SIZE in limits.h. */
 #undef  PAGE_SIZE
-#define PAGE_SIZE     (1 << PAGE_SHIFT)
+#define PAGE_SIZE     (1L << PAGE_SHIFT)
 #define MAX_ORDER     18 /* 2 * PAGETABLE_ORDER (9) */
 
 #define PFN_DOWN(x)   ((x) >> PAGE_SHIFT)

xen/common/pdx.c

@@ -274,7 +274,7 @@ bool __init pfn_pdx_compression_setup(paddr_t base)
 
     pfn_pdx_hole_shift  = hole_shift;
     pfn_pdx_bottom_mask = (1UL << bottom_shift) - 1;
-    ma_va_bottom_mask   = ((paddr_t)PAGE_SIZE << bottom_shift) - 1;
+    ma_va_bottom_mask   = (PAGE_SIZE << bottom_shift) - 1;
     pfn_hole_mask       = ((1UL << hole_shift) - 1) << bottom_shift;
     pfn_top_mask        = ~(pfn_pdx_bottom_mask | pfn_hole_mask);
     ma_top_mask         = pfn_top_mask << PAGE_SHIFT;