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| author | James Hogan | 2017-03-31 16:40:52 +0200 |
|---|---|---|
| committer | James Hogan | 2017-04-05 16:27:32 +0200 |
| commit | d3ba2e922d4d1d61806fcb6e09512d2bee734d06 (patch) | |
| tree | 5ef9ef8b411faacfd92cedbc89990ad7ee7f6710 /arch/metag/lib | |
| parent | metag/usercopy: Simplify rapf loop fixup corner case (diff) | |
| download | kernel-qcow2-linux-d3ba2e922d4d1d61806fcb6e09512d2bee734d06.tar.gz kernel-qcow2-linux-d3ba2e922d4d1d61806fcb6e09512d2bee734d06.tar.xz kernel-qcow2-linux-d3ba2e922d4d1d61806fcb6e09512d2bee734d06.zip | |
metag/usercopy: Add 64-bit get_user support
Metag already supports 64-bit put_user, so add support for 64-bit
get_user too so that the test_user_copy module can test both.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-metag@vger.kernel.org
Diffstat (limited to 'arch/metag/lib')
| -rw-r--r-- | arch/metag/lib/usercopy.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/metag/lib/usercopy.c b/arch/metag/lib/usercopy.c index ceb4590fbca5..45e7b79eca19 100644 --- a/arch/metag/lib/usercopy.c +++ b/arch/metag/lib/usercopy.c @@ -1044,6 +1044,30 @@ unsigned int __get_user_asm_d(const void __user *addr, long *err) } EXPORT_SYMBOL(__get_user_asm_d); +unsigned long long __get_user_asm_l(const void __user *addr, long *err) +{ + register unsigned long long x asm ("D0Re0") = 0; + asm volatile ( + " GETL %0,%t0,[%2]\n" + "1:\n" + " GETL %0,%t0,[%2]\n" + "2:\n" + " .section .fixup,\"ax\"\n" + "3: MOV D0FrT,%3\n" + " SETD [%1],D0FrT\n" + " MOVT D0FrT,#HI(2b)\n" + " JUMP D0FrT,#LO(2b)\n" + " .previous\n" + " .section __ex_table,\"a\"\n" + " .long 1b,3b\n" + " .previous\n" + : "=r" (x) + : "r" (err), "r" (addr), "P" (-EFAULT) + : "D0FrT"); + return x; +} +EXPORT_SYMBOL(__get_user_asm_l); + long __put_user_asm_b(unsigned int x, void __user *addr) { register unsigned int err asm ("D0Re0") = 0; |