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path: root/src/backend/storage/buffer/bufmgr.c
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Diffstat (limited to 'src/backend/storage/buffer/bufmgr.c')
-rw-r--r--src/backend/storage/buffer/bufmgr.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c
index 80b0d0c5ded..75cfc2b6fe9 100644
--- a/src/backend/storage/buffer/bufmgr.c
+++ b/src/backend/storage/buffer/bufmgr.c
@@ -3981,8 +3981,8 @@ BufferIsPermanent(Buffer buffer)
XLogRecPtr
BufferGetLSNAtomic(Buffer buffer)
{
- BufferDesc *bufHdr = GetBufferDescriptor(buffer - 1);
char *page = BufferGetPage(buffer);
+ BufferDesc *bufHdr;
XLogRecPtr lsn;
uint32 buf_state;
@@ -3996,6 +3996,7 @@ BufferGetLSNAtomic(Buffer buffer)
Assert(BufferIsValid(buffer));
Assert(BufferIsPinned(buffer));
+ bufHdr = GetBufferDescriptor(buffer - 1);
buf_state = LockBufHdr(bufHdr);
lsn = PageGetLSN(page);
UnlockBufHdr(bufHdr, buf_state);