From 6cf7362917e52632a6df34700c8578412d94cc86 Mon Sep 17 00:00:00 2001
From: bobijam <bobijam>
Date: Thu, 2 Aug 2007 02:26:30 +0000
Subject: [PATCH] Branch:b1_6 b=12606 i=shadow, nikita

Description: don't use GFP_* in generic Lustre code.
Details    : Use cfs_alloc_* functions and CFS_* flags for code portability.
---
 lnet/include/libcfs/libcfs.h          | 14 +++++++-------
 lnet/include/libcfs/linux/linux-mem.h | 10 +++++++---
 lnet/libcfs/linux/linux-mem.c         | 14 +++++++++++---
 3 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/lnet/include/libcfs/libcfs.h b/lnet/include/libcfs/libcfs.h
index 188924e..88f1a37 100644
--- a/lnet/include/libcfs/libcfs.h
+++ b/lnet/include/libcfs/libcfs.h
@@ -546,18 +546,18 @@ static inline cfs_duration_t cfs_timeout_cap(cfs_duration_t timeout)
  */
 enum cfs_alloc_flags {
         /* allocation is not allowed to block */
-        CFS_ALLOC_ATOMIC = (1 << 0),
+        CFS_ALLOC_ATOMIC = 0x1,
         /* allocation is allowed to block */
-        CFS_ALLOC_WAIT = (1 << 1),
+        CFS_ALLOC_WAIT   = 0x2,
         /* allocation should return zeroed memory */
-        CFS_ALLOC_ZERO   = (1 << 2),
+        CFS_ALLOC_ZERO   = 0x4,
         /* allocation is allowed to call file-system code to free/clean
          * memory */
-        CFS_ALLOC_FS     = (1 << 3),
+        CFS_ALLOC_FS     = 0x8,
         /* allocation is allowed to do io to free/clean memory */
-        CFS_ALLOC_IO     = (1 << 4),
+        CFS_ALLOC_IO     = 0x10,
         /* don't report allocation failure to the console */
-        CFS_ALLOC_NOWARN = (1 << 5),
+        CFS_ALLOC_NOWARN = 0x20,
         /* standard allocator flag combination */
         CFS_ALLOC_STD    = CFS_ALLOC_FS | CFS_ALLOC_IO,
         CFS_ALLOC_USER   = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO,
@@ -567,7 +567,7 @@ enum cfs_alloc_flags {
 enum cfs_alloc_page_flags {
         /* allow to return page beyond KVM. It has to be mapped into KVM by
          * cfs_page_map(); */
-        CFS_ALLOC_HIGH   = (1 << 5),
+        CFS_ALLOC_HIGH   = 0x40,
         CFS_ALLOC_HIGHUSER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO | CFS_ALLOC_HIGH,
 };
 
diff --git a/lnet/include/libcfs/linux/linux-mem.h b/lnet/include/libcfs/linux/linux-mem.h
index 9a49dda..4f19edd 100644
--- a/lnet/include/libcfs/linux/linux-mem.h
+++ b/lnet/include/libcfs/linux/linux-mem.h
@@ -43,9 +43,6 @@ typedef struct page                     cfs_page_t;
 #define CFS_PAGE_SHIFT                  PAGE_CACHE_SHIFT
 #define CFS_PAGE_MASK                   (~((__u64)CFS_PAGE_SIZE-1))
 
-cfs_page_t *cfs_alloc_page(unsigned int flags);
-#define cfs_free_page(p)		__free_pages(p, 0)
-
 static inline void *cfs_page_address(cfs_page_t *page)
 {
         /*
@@ -87,6 +84,13 @@ extern void  cfs_free(void *addr);
 extern void *cfs_alloc_large(size_t nr_bytes);
 extern void  cfs_free_large(void *addr);
 
+extern cfs_page_t *cfs_alloc_pages(unsigned int flags, unsigned int order);
+extern void __cfs_free_pages(cfs_page_t *page, unsigned int order);
+
+#define cfs_alloc_page(flags)  cfs_alloc_pages(flags, 0)
+#define __cfs_free_page(page)  __cfs_free_pages(page, 0)
+#define cfs_free_page(p)       __free_pages(p, 0)
+
 /*
  * In Linux there is no way to determine whether current execution context is
  * blockable.
diff --git a/lnet/libcfs/linux/linux-mem.c b/lnet/libcfs/linux/linux-mem.c
index f327814..fc3896a 100644
--- a/lnet/libcfs/linux/linux-mem.c
+++ b/lnet/libcfs/linux/linux-mem.c
@@ -51,6 +51,8 @@ static unsigned int cfs_alloc_flags_to_gfp(u_int32_t flags)
 #endif
         if (flags & CFS_ALLOC_FS)
                 mflags |= __GFP_FS;
+        if (flags & CFS_ALLOC_HIGH)
+                mflags |= __GFP_HIGH;
         return mflags;
 }
 
@@ -83,13 +85,18 @@ cfs_free_large(void *addr)
 	vfree(addr);
 }
 
-cfs_page_t *cfs_alloc_page(unsigned int flags)
+cfs_page_t *cfs_alloc_pages(unsigned int flags, unsigned int order)
 {
         /*
          * XXX nikita: do NOT call portals_debug_msg() (CDEBUG/ENTRY/EXIT)
          * from here: this will lead to infinite recursion.
          */
-        return alloc_pages(cfs_alloc_flags_to_gfp(flags), 0);
+        return alloc_pages(cfs_alloc_flags_to_gfp(flags), order);
+}
+
+void __cfs_free_pages(cfs_page_t *page, unsigned int order)
+{
+        __free_pages(page, order);
 }
 
 cfs_mem_cache_t *
@@ -126,7 +133,8 @@ EXPORT_SYMBOL(cfs_alloc);
 EXPORT_SYMBOL(cfs_free);
 EXPORT_SYMBOL(cfs_alloc_large);
 EXPORT_SYMBOL(cfs_free_large);
-EXPORT_SYMBOL(cfs_alloc_page);
+EXPORT_SYMBOL(cfs_alloc_pages);
+EXPORT_SYMBOL(__cfs_free_pages);
 EXPORT_SYMBOL(cfs_mem_cache_create);
 EXPORT_SYMBOL(cfs_mem_cache_destroy);
 EXPORT_SYMBOL(cfs_mem_cache_alloc);
-- 
1.8.3.1