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12a0ef7b0a
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8 Commits

Author SHA1 Message Date
Will Deacon
12a0ef7b0a arm64: use generic strnlen_user and strncpy_from_user functions 
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 <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 2013-12-19 17:43:06 +00:00
Catalin Marinas
2a3f912c78 arm64: Export __copy_in_user() to modules 
This function may be called from loadable modules, so it needs
exporting.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Loc Ho <lho@apm.com>
 2013-10-24 15:47:19 +01:00
Chen Gang
726dcaa158 arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)' 
Need 'EXPORT_SYMBOL(clear_page)' if building with allmodconfig.

The related errors:
  ERROR: "clear_page" [fs/ocfs2/dlm/ocfs2_dlm.ko] undefined!
  ERROR: "clear_page" [fs/ntfs/ntfs.ko] undefined!
  ERROR: "clear_page" [fs/gfs2/gfs2.ko] undefined!
  ERROR: "clear_page" [fs/fuse/fuse.ko] undefined!
  ERROR: "clear_page" [fs/ext3/ext3.ko] undefined!
  ERROR: "clear_page" [fs/ext2/ext2.ko] undefined!
  ERROR: "clear_page" [fs/exofs/libore.ko] undefined!
  ERROR: "clear_page" [fs/exofs/exofs.ko] undefined!
  ERROR: "clear_page" [drivers/block/brd.ko] undefined!

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 2013-05-24 17:31:03 +01:00
Catalin Marinas
6247958653 arm64: klib: Optimised atomic bitops 
This patch implements the AArch64-specific atomic bitops functions using
exclusive memory accesses to avoid locking.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 2013-03-21 17:39:31 +00:00
Catalin Marinas
2b8cac814c arm64: klib: Optimised string functions 
This patch introduces AArch64-specific string functions (strchr,
strrchr).

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 2013-03-21 17:39:30 +00:00
Catalin Marinas
4a8992271c arm64: klib: Optimised memory functions 
This patch introduces AArch64-specific memory functions (memcpy,
memmove, memchr, memset). These functions are not optimised for any CPU
implementation but can be used as a starting point once hardware is
available.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 2013-03-21 17:39:29 +00:00
Catalin Marinas
a2c91547b5 arm64: Fix build error with !SMP 
The __atomic_hash is only defined when SMP is enabled but the
arm64ksyms.c exports it even for the UP case.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 2013-03-18 10:42:14 +00:00
Marc Zyngier
f27bb139c3 arm64: Miscellaneous library functions 
This patch adds udelay, memory and bit operations together with the
ksyms exports.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
 2012-09-17 13:42:18 +01:00