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authorDavid Daney <david.daney@cavium.com>2012-06-07 00:00:31 +0200
committerRalf Baechle <ralf@linux-mips.org>2012-07-23 14:55:55 +0200
commitbb0757ebb929d5d6ba484b4313976847285ba280 (patch)
treef3a138d260d52fca71d7170e42415235ce6cc46b /arch/mips/include/asm/uaccess.h
parentMIPS: Octeon: Implement Octeon specific __copy_user_inatomic (diff)
downloadlinux-bb0757ebb929d5d6ba484b4313976847285ba280.tar.xz
linux-bb0757ebb929d5d6ba484b4313976847285ba280.zip
MIPS: Unify memcpy.S and memcpy-inatomic.S
We can save the 451 lines of code that comprise memcpy-inatomic.S at the expense of a single instruction in the memcpy prolog. We also use an additional register (t6), so this may cause increased register pressure in some places as well. But I think the reduced maintenance burden, of not having two nearly identical implementations, makes it worth it. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/uaccess.h')
-rw-r--r--arch/mips/include/asm/uaccess.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index 653a412c036c..3b92efef56d3 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -687,7 +687,7 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n);
__MODULE_JAL(__copy_user) \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
- : "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \
+ : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})
@@ -797,7 +797,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
".set\treorder" \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
- : "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \
+ : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})
@@ -820,7 +820,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
".set\treorder" \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
- : "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \
+ : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})