LTTng needs this symbol exported. It calls it to ensure its tracing
buffers and allocated data structures never trigger a page fault. This
is required to handle page fault handler tracing and NMI tracing
gracefully.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
CC: Christoph Hellwig <hch@xxxxxxxxxxxxx>
CC: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
CC: Tejun Heo <tj@xxxxxxxxxx>
CC: David Howells <dhowells@xxxxxxxxxx>
CC: David McCullough <davidm@xxxxxxxxxxxx>
CC: D Jeff Dionne <jeff@xxxxxxxxxxx>
CC: Greg Ungerer <gerg@xxxxxxxxxxxx>
CC: Paul Mundt <lethal@xxxxxxxxxxxx>
CC: linux-mm@xxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx
CC: Greg KH <greg@xxxxxxxxx>
---
mm/nommu.c | 1 +
mm/vmalloc.c | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/mm/nommu.c b/mm/nommu.c
index b982290..b22a0d9 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -441,6 +441,7 @@ EXPORT_SYMBOL_GPL(vm_unmap_aliases);
void __attribute__((weak)) vmalloc_sync_all(void)
{
}
+EXPORT_SYMBOL_GPL(vmalloc_sync_all);
/**
* alloc_vm_area - allocate a range of kernel address space
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 3231bf3..37ddce5 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2137,6 +2137,7 @@ EXPORT_SYMBOL(remap_vmalloc_range);
void __attribute__((weak)) vmalloc_sync_all(void)
{
}
+EXPORT_SYMBOL_GPL(vmalloc_sync_all);
static int f(pte_t *pte, pgtable_t table, unsigned long addr, void *data)
--
1.7.5.4
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