x86: add flags parameter to reserve_bootmem_generic()

This patch adds a 'flags' parameter to reserve_bootmem_generic() like it
already has been added in reserve_bootmem() with commit
72a7fe3967dbf86cb34e24fbf1d957fe24d2f246.

It also changes all users to use BOOTMEM_DEFAULT, which doesn't effectively
change the behaviour. Since the change is x86-specific, I don't think it's
necessary to add a new API for migration. There are only 4 users of that
function.

The change is necessary for the next patch, using reserve_bootmem_generic()
for crashkernel reservation.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 16 insertions, 8 deletions

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 1cc7a4b8643f..6ae60909b601 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -880,10 +880,11 @@ static int __init smp_scan_config(unsigned long base, unsigned long length,
                         if (!reserve)
                                 return 1;
 
-                        reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE);
+                        reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE,
+                                BOOTMEM_DEFAULT);
                         if (mpf->mpf_physptr)
                                 reserve_bootmem_generic(mpf->mpf_physptr,
-                                                        PAGE_SIZE);
+                                        PAGE_SIZE, BOOTMEM_DEFAULT);
 #endif
                 return 1;
                 }
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 819dad973b13..bf7bf1de6c25 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -799,12 +799,13 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 }
 #endif
 
-void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
+int __init reserve_bootmem_generic(unsigned long phys, unsigned len, int flags)
 {
 #ifdef CONFIG_NUMA
         int nid, next_nid;
 #endif
         unsigned long pfn = phys >> PAGE_SHIFT;
+        int ret;
 
         if (pfn >= end_pfn) {
                 /*
@@ -812,11 +813,11 @@ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
                  * firmware tables:
                  */
                 if (pfn < max_pfn_mapped)
-                        return;
+                        return -EFAULT;
 
                 printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n",
                                 phys, len);
-                return;
+                return -EFAULT;
         }
 
         /* Should check here against the e820 map to avoid double free */
@@ -824,9 +825,13 @@ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
         nid = phys_to_nid(phys);
         next_nid = phys_to_nid(phys + len - 1);
         if (nid == next_nid)
-                reserve_bootmem_node(NODE_DATA(nid), phys, len, BOOTMEM_DEFAULT);
+                ret = reserve_bootmem_node(NODE_DATA(nid), phys, len, flags);
         else
-                reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
+                ret = reserve_bootmem(phys, len, flags);
+
+        if (ret != 0)
+                return ret;
+
 #else
         reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
 #endif
@@ -835,6 +840,8 @@ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
                 dma_reserve += len / PAGE_SIZE;
                 set_dma_reserve(dma_reserve);
         }
+
+        return 0;
 }
 
 int kern_addr_valid(unsigned long addr)
diff --git a/include/asm-x86/proto.h b/include/asm-x86/proto.h
index 6c8b41b03f6d..a9f51472521e 100644
--- a/include/asm-x86/proto.h
+++ b/include/asm-x86/proto.h
@@ -14,7 +14,7 @@ extern void ia32_syscall(void);
 extern void ia32_cstar_target(void);
 extern void ia32_sysenter_target(void);
 
-extern void reserve_bootmem_generic(unsigned long phys, unsigned len);
+extern int reserve_bootmem_generic(unsigned long phys, unsigned len, int flags);
 
 extern void syscall32_cpu_init(void);