BMC/Intel-BMC/linux.git/arch/arm64/include/asm/uaccess.h, branch dev

arm64: macro whitespace fixes

2015-01-13T13:23:53+00:00

While working on arch/arm64/include/asm/uaccess.h, I noticed that one macro within this header is made harder to read because it violates a coding style rule: space is missing after comma. Fix it up. Signed-off-by: Michael S. Tsirkin Acked-by: Will Deacon

arm64/uaccess: fix sparse errors

2015-01-13T13:23:02+00:00

virtio wants to read bitwise types from userspace using get_user. At the moment this triggers sparse errors, since the value is passed through an integer. Fix that up using __force. Signed-off-by: Michael S. Tsirkin Acked-by: Will Deacon

arm64: Fix __range_ok macro

2014-03-20T17:41:27+00:00

Without this, the following scenario is incorrectly determined to be invalid. addr 0x7f_ffffe000 size 8192 addr_limit 0x80_00000000 This behavior was observed while trying to vmsplice the stack as part of a CRIU dump of a process on a system started with the norandmaps kernel parameter. Signed-off-by: Christopher Covington Signed-off-by: Catalin Marinas

arm64: use generic strnlen_user and strncpy_from_user functions

2013-12-19T17:43:06+00:00

This patch implements the word-at-a-time interface for arm64 using the same algorithm as ARM. We use the fls64 macro, which expands to a clz instruction via a compiler builtin. Big-endian configurations make use of the implementation from asm-generic. With this implemented, we can replace our byte-at-a-time strnlen_user and strncpy_from_user functions with the optimised generic versions. Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas

arm64: avoid multiple evaluation of ptr in get_user/put_user()

2013-09-25T15:42:21+00:00

get_user() is defined as a function macro in arm64, and trace_get_user() calls it as followed: get_user(ch, ptr++); Since the second parameter occurs twice in the definition, 'ptr++' is unexpectedly evaluated twice and trace_get_user() will generate a bogus string from user-provided one. As a result, some ftrace sysfs operations, like "echo FUNCNAME > set_ftrace_filter," hit this case and eventually fail. This patch fixes the issue both in get_user() and put_user(). Signed-off-by: AKASHI Takahiro [catalin.marinas@arm.com: added __user type annotation and s/optr/__p/] Signed-off-by: Catalin Marinas

arm64: uaccess s/might_sleep/might_fault/

2013-05-28T07:41:06+00:00

The only reason uaccess routines might sleep is if they fault. Make this explicit. Signed-off-by: Michael S. Tsirkin Acked-by: Catalin Marinas Signed-off-by: Peter Zijlstra Cc: Linus Torvalds Cc: Andrew Morton Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1369577426-26721-2-git-send-email-mst@redhat.com Signed-off-by: Ingo Molnar

arm64: User access library functions

2012-09-17T12:42:11+00:00

This patch add support for various user access functions. These functions use the standard LDR/STR instructions and not the LDRT/STRT variants in order to allow kernel addresses (after set_fs(KERNEL_DS)). Signed-off-by: Will Deacon Signed-off-by: Marc Zyngier Signed-off-by: Catalin Marinas Acked-by: Tony Lindgren Acked-by: Nicolas Pitre Acked-by: Olof Johansson Acked-by: Santosh Shilimkar Acked-by: Arnd Bergmann