kbuild: remove cc-option test of -fno-strict-overflow

[linux-2.6-microblaze.git] / fs / Kconfig

diff --git a/fs/Kconfig b/fs/Kconfig
index a88aa3a..aa4c122 100644 (file)
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -201,6 +201,27 @@ config TMPFS_XATTR
 
          If unsure, say N.
 
+config TMPFS_INODE64
+       bool "Use 64-bit ino_t by default in tmpfs"
+       depends on TMPFS && 64BIT
+       default n
+       help
+         tmpfs has historically used only inode numbers as wide as an unsigned
+         int. In some cases this can cause wraparound, potentially resulting
+         in multiple files with the same inode number on a single device. This
+         option makes tmpfs use the full width of ino_t by default, without
+         needing to specify the inode64 option when mounting.
+
+         But if a long-lived tmpfs is to be accessed by 32-bit applications so
+         ancient that opening a file larger than 2GiB fails with EINVAL, then
+         the INODE64 config option and inode64 mount option risk operations
+         failing with EOVERFLOW once 33-bit inode numbers are reached.
+
+         To override this configured default, use the inode32 or inode64
+         option when mounting.
+
+         If unsure, say N.
+
 config HUGETLBFS
        bool "HugeTLB file system support"
        depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \