On s390 and PPC, the mm_context does not have a void *vdso member, but
rather an unsigned long vdso_base. Since we cast the void * to an
unsigned long anyway, add an arch-specific cr_arch_vdso() function to
return the address.
This is tested on s390 and x86, but needs PPC validation.
Signed-off-by: Dan Smith <[email protected]>
---
arch/powerpc/mm/checkpoint.c | 6 ++++++
arch/s390/mm/checkpoint.c | 6 ++++++
arch/x86/mm/checkpoint.c | 5 +++++
checkpoint/checkpoint_arch.h | 1 +
checkpoint/rstr_mem.c | 2 +-
5 files changed, 19 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/mm/checkpoint.c b/arch/powerpc/mm/checkpoint.c
index 731874b..7d56ff7 100644
--- a/arch/powerpc/mm/checkpoint.c
+++ b/arch/powerpc/mm/checkpoint.c
@@ -498,3 +498,9 @@ int cr_read_mm_context(struct cr_ctx *ctx, struct mm_struct
*mm)
{
return 0;
}
+
+unsigned long cr_arch_vdso(struct cr_ctx *ctx, struct mm_struct *mm)
+{
+ return mm->context.vdso_base;
+}
+
diff --git a/arch/s390/mm/checkpoint.c b/arch/s390/mm/checkpoint.c
index 263d8bd..68be905 100644
--- a/arch/s390/mm/checkpoint.c
+++ b/arch/s390/mm/checkpoint.c
@@ -119,3 +119,9 @@ int cr_write_mm_context(struct cr_ctx *ctx, struct
mm_struct *mm)
return ret;
}
+
+unsigned long cr_arch_vdso(struct cr_ctx *ctx, struct mm_struct *mm)
+{
+ return mm->context.vdso_base;
+}
+
diff --git a/arch/x86/mm/checkpoint.c b/arch/x86/mm/checkpoint.c
index 64e6635..0a3fee6 100644
--- a/arch/x86/mm/checkpoint.c
+++ b/arch/x86/mm/checkpoint.c
@@ -271,3 +271,8 @@ int cr_write_mm_context(struct cr_ctx *ctx, struct
mm_struct *mm)
mutex_unlock(&mm->context.lock);
return ret;
}
+
+unsigned long cr_arch_vdso(struct cr_ctx *ctx, struct mm_struct *mm)
+{
+ return (unsigned long)mm->context.vdso;
+}
diff --git a/checkpoint/checkpoint_arch.h b/checkpoint/checkpoint_arch.h
index 0afe666..e189811 100644
--- a/checkpoint/checkpoint_arch.h
+++ b/checkpoint/checkpoint_arch.h
@@ -1,6 +1,7 @@
#include <linux/checkpoint.h>
extern int cr_retval_restart(struct cr_ctx *ctx);
+extern unsigned long cr_arch_vdso(struct cr_ctx *ctx, struct mm_struct *mm);
extern int cr_write_head_arch(struct cr_ctx *ctx);
extern int cr_write_thread(struct cr_ctx *ctx, struct task_struct *t);
diff --git a/checkpoint/rstr_mem.c b/checkpoint/rstr_mem.c
index 7e73129..ca3a2fd 100644
--- a/checkpoint/rstr_mem.c
+++ b/checkpoint/rstr_mem.c
@@ -416,7 +416,7 @@ static int cr_read_vma(struct cr_ctx *ctx, struct mm_struct
*mm)
/* handle special VDSO vma */
if (vma_type == CR_VMA_VDSO) {
- if (vm_start != (unsigned long) mm->context.vdso)
+ if (vm_start != cr_arch_vdso(ctx, mm))
goto out;
/* FIXME: uggh ... need to dig in */
ret = 0;
--
1.6.1
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