Merge pull request #9 from sy-c/master

fix for RHEL9.6

Author: sy-c

patches/linux_uio/uio_pci_dma.h

@@ -317,6 +317,19 @@ BIN_ATTR_MAP_CALLBACK( map_sg );
 #include <linux/pfn_t.h>
 #endif
 
+/**
+  RH 9.6 includes a kernel with interface changes.
+  It is still named 5.14.0 (release 570.16.1) but includes backports, and needs the updates desribed below
+  as for get_user_pages() 6.5.0 and MAX_PAGE_ORDER 6.8.0
+  RH 9.5 still has the previous interface.
+ **/
+#ifdef RHEL_RELEASE_CODE
+  #if RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(9, 6)
+    #define RHEL_FIX_KERNEL_202505
+  #endif
+#endif
+
+
 /**
  * Kernel 4.6 introduced six-argument get_user_pages()
  * https://github.com/torvalds/linux/commit/c12d2da56d0e07d230968ee2305aaa86b93a6832
@@ -328,7 +341,7 @@ BIN_ATTR_MAP_CALLBACK( map_sg );
  * Kernel 6.5 removes unused vmas parameter from get_user_pages()
  * https://github.com/torvalds/linux/commit/54d020692b342f7bd02d7f5795fb5c401caecfcc
  **/
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 5, 0)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 5, 0) || defined(RHEL_FIX_KERNEL_202505)
 #define PDA_FOURARG_GUP
 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)
 #define PDA_FIVEARG_GUP
@@ -343,7 +356,7 @@ BIN_ATTR_MAP_CALLBACK( map_sg );
  * Kernel 6.8 renames MAX_ORDER to MAX_PAGE_ORDER
  * https://github.com/torvalds/linux/commit/5e0a760b44417f7cadd79de2204d6247109558a0
  **/
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 8, 0)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 8, 0) || defined(RHEL_FIX_KERNEL_202505)
 #define PDA_MAX_PAGE_ORDER_RENAMED
 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(6, 4, 0)
 #define PDA_MAX_PAGE_ORDER_INCLUSIVE