From: David Howells Date: Fri, 11 May 2012 09:56:56 +0000 (+0100) Subject: KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat X-Git-Tag: v3.2.19~93 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=215c55abf9534e37ab8971d6e70e4ba8bf59e985;p=pandora-kernel.git KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat commit 45de6767dc51358a188f75dc4ad9dfddb7fb9480 upstream. Use the 32-bit compat keyctl() syscall wrapper on Sparc64 for Sparc32 binary compatibility. Without this, keyctl(KEYCTL_INSTANTIATE_IOV) is liable to malfunction as it uses an iovec array read from userspace - though the kernel should survive this as it checks pointers and sizes anyway. I think all the other keyctl() function should just work, provided (a) the top 32-bits of each 64-bit argument register are cleared prior to invoking the syscall routine, and the 32-bit address space is right at the 0-end of the 64-bit address space. Most of the arguments are 32-bit anyway, and so for those clearing is not required. Signed-off-by: David Howells cc: sparclinux@vger.kernel.org Signed-off-by: Ben Hutchings --- Reading git-diff-tree failed