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-rw-r--r--package/mtd/src/fis.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/package/mtd/src/fis.c b/package/mtd/src/fis.c
index b285d24db4..559ca95069 100644
--- a/package/mtd/src/fis.c
+++ b/package/mtd/src/fis.c
@@ -77,7 +77,7 @@ fis_open(void)
goto error;
fis_erasesize = erasesize;
- desc = mmap(NULL, erasesize, PROT_READ|PROT_WRITE, MAP_SHARED, fis_fd, 0);
+ desc = mmap(NULL, erasesize, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_LOCKED, fis_fd, 0);
if (desc == MAP_FAILED)
goto error;