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authorJoe Hershberger <joe.hershberger@ni.com>2012-10-04 08:31:00 +0000
committerTom Rini <trini@ti.com>2012-10-15 11:54:05 -0700
commit1c4ea78aa7ca53fa5b1d09753fea35908922ce55 (patch)
treeb131a42e9cf7401f89eb9e6f8769404dcd7d22f4 /tools
parent586197dfe42ffda777205b02fe404107eb7d974a (diff)
downloadu-boot-linaro-stable-1c4ea78aa7ca53fa5b1d09753fea35908922ce55.tar.gz
tools: Add a README note about fw_printenv lock file
Add a mention of the lock file to the README for the fw_printenv tool. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Reported-by: Luka Perkov <uboot@lukaperkov.net>
Diffstat (limited to 'tools')
-rw-r--r--tools/env/README4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/env/README b/tools/env/README
index 3f0d77e2a..df020e4af 100644
--- a/tools/env/README
+++ b/tools/env/README
@@ -55,3 +55,7 @@ partition where the environment resides.
DEVICEx_ENVSECTORS defines the number of sectors that may be used for
this environment instance. On NAND this is used to limit the range
within which bad blocks are skipped, on NOR it is not used.
+
+To prevent losing changes to the environment and to prevent confusing the MTD
+drivers, a lock file at /var/lock/fw_printenv.lock is used to serialize access
+to the environment.