pgprot removed in 88dca4c

[  139s] /home/abuild/rpmbuild/BUILD/drbd-9.0.23~1+git.d16bfab7/default/drbd_bitmap.c: In function 'bm_realloc_pages':
[  139s] /home/abuild/rpmbuild/BUILD/drbd-9.0.23~1+git.d16bfab7/default/drbd_bitmap.c:368:15: error: too many arguments to function '__vmalloc'
[  139s]   368 |   new_pages = __vmalloc(bytes,
[  139s]       |               ^~~~~~~~~
[  139s] In file included from /home/abuild/rpmbuild/BUILD/drbd-9.0.23~1+git.d16bfab7/default/drbd_bitmap.c:16:
[  139s] /usr/src/linux-5.8.0-1/include/linux/vmalloc.h:111:14: note: declared here
[  139s]   111 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask);
[  139s]       |              ^~~~~~~~~

diff -Naur drbd-9.0.24~1+git.17730ea3.orig/drbd/drbd-kernel-compat/drbd_wrappers.h drbd-9.0.24~1+git.17730ea3/drbd/drbd-kernel-compat/drbd_wrappers.h
--- drbd-9.0.24~1+git.17730ea3.orig/drbd/drbd-kernel-compat/drbd_wrappers.h	2020-08-13 14:22:17.895201728 +0800
+++ drbd-9.0.24~1+git.17730ea3/drbd/drbd-kernel-compat/drbd_wrappers.h	2020-08-13 14:33:13.168276614 +0800
@@ -521,4 +521,8 @@
 void arch_wb_cache_pmem(void *addr, size_t size);
 #endif
 
+#ifndef COMPAT_HAVE_VMALLOC_NO_PGPROT
+#define __vmalloc(SIZE, GFP, PRGROT) __vmalloc(SIZE, GFP)
+#endif
+
 #endif
diff -Naur drbd-9.0.24~1+git.17730ea3.orig/drbd/drbd-kernel-compat/tests/have_vmalloc_no_pgprot.c drbd-9.0.24~1+git.17730ea3/drbd/drbd-kernel-compat/tests/have_vmalloc_no_pgprot.c
--- drbd-9.0.24~1+git.17730ea3.orig/drbd/drbd-kernel-compat/tests/have_vmalloc_no_pgprot.c	1970-01-01 08:00:00.000000000 +0800
+++ drbd-9.0.24~1+git.17730ea3/drbd/drbd-kernel-compat/tests/have_vmalloc_no_pgprot.c	2020-08-13 14:29:04.930365926 +0800
@@ -0,0 +1,15 @@
+/*
+ * Because RHEL 7.5 chose to provide refcount.h, but not use it, we don't
+ * directly include refcount.h, but rely on the implicit include via kref.h,
+ * This way, we avoid compile time warnings about atomic_t != refcount_t.
+ */
+#include <linux/vmalloc.h>
+
+/*
+ * extern void *__vmalloc(unsigned long size, gfp_t gfp_mask);
+ * 88dca4c mm: remove the pgprot argument to __vmalloc
+*/
+void test(unsigned long bytes)
+{
+	__vmalloc(bytes, GFP_NOIO | __GFP_ZERO);
+}