diff mbox

[V3,3/4] x86/kvm: Resolve shadow warnings in macro expansion

Message ID 20140731165942.53703.61587.stgit@mdrustad-wks.jf.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Rustad, Mark D July 31, 2014, 4:59 p.m. UTC 
Resolve shadow warnings that appear in W=2 builds. Instead of
using ret to hold the return pointer, save the length in a new
variable saved_len and compute the pointer on exit. This also
resolves a very technical error, in that ret was declared as
a const char *, when it really was a char * const, which
theoretically could have allowed the compiler to do something
wrong.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

---
Changes in V2:
- Instead of renaming all inner variables, just delete the
  ret variable in favor of the new saved_len variable.
---
 arch/x86/kvm/mmutrace.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)


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diff mbox

Patch

diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h
index 9d2e0ffcb190..5aaf35641768 100644
--- a/arch/x86/kvm/mmutrace.h
+++ b/arch/x86/kvm/mmutrace.h
@@ -22,7 +22,7 @@ 
 	__entry->unsync = sp->unsync;
 
 #define KVM_MMU_PAGE_PRINTK() ({				        \
-	const char *ret = p->buffer + p->len;				\
+	const u32 saved_len = p->len;					\
 	static const char *access_str[] = {			        \
 		"---", "--x", "w--", "w-x", "-u-", "-ux", "wu-", "wux"  \
 	};							        \
@@ -41,7 +41,7 @@ 
 			 role.nxe ? "" : "!",				\
 			 __entry->root_count,				\
 			 __entry->unsync ? "unsync" : "sync", 0);	\
-	ret;								\
+	p->buffer + saved_len;						\
 		})
 
 #define kvm_mmu_trace_pferr_flags       \