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Re: [Xen-devel] [PATCH] mm/shadow: fix declaration of fetch_type_names



Hi,

On 17/10/17 11:29, Andrew Cooper wrote:
On 17/10/17 11:23, Roger Pau Monne wrote:
fetch_type_names usage is guarded by SHADOW_DEBUG_PROPAGATE in
SHADOW_DEBUG, fix the declaration so it's also guarded by
SHADOW_DEBUG_PROPAGATE instead of DEBUG_TRACE_DUMP.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Possibly worth noting that this is exposed by Clang when building with
UBSAN ?

Either way, thanks for getting to the bottom of this issue.  (It's been
on my TODO list to figure out for a rather long time.)

Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, and I agree that
this should go into 4.10.

Release-acked-by: Julien Grall <julien.grall@xxxxxxxxxx>

Cheers,


---
Cc: Tim Deegan <tim@xxxxxxx>
Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxxxxx>
---
IMHO, this is a simple compile-time fix, so it should be accepted for
4.10. Any breaking caused by this commit will be spotted at compile
time.
---
  xen/arch/x86/mm/shadow/multi.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c
index d540af11d7..9156382056 100644
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -77,7 +77,7 @@ typedef enum {
extern const char *const fetch_type_names[]; -#if defined(DEBUG_TRACE_DUMP) && CONFIG_PAGING_LEVELS == GUEST_PAGING_LEVELS
+#if SHADOW_DEBUG_PROPAGATE && CONFIG_PAGING_LEVELS == GUEST_PAGING_LEVELS
  const char *const fetch_type_names[] = {
      [ft_prefetch]     = "prefetch",
      [ft_demand_read]  = "demand read",


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--
Julien Grall

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