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authorAl Viro <viro@zeniv.linux.org.uk>2022-01-30 21:25:53 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2022-01-30 21:26:39 -0500
commit6692531df62d812de5d22c8bca0d90edc163aa84 (patch)
tree1d5b5b7ef15676ad8f95a80834b1a2e9a2da2a97 /arch
parent0c9dceb9bb6dadbf340f09c69e598d4729bbb86a (diff)
downloadlinux-6692531df62d812de5d22c8bca0d90edc163aa84.tar.bz2
uml/x86: use x86 load_unaligned_zeropad()
allows, among other things, to drop !DCACHE_WORD_ACCESS mess in x86 csum-partial_64.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/um/include/asm/Kbuild1
-rw-r--r--arch/x86/lib/csum-partial_64.c26
-rw-r--r--arch/x86/um/Kconfig1
3 files changed, 1 insertions, 27 deletions
diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild
index e5a7b552bb38..a58b67ec8119 100644
--- a/arch/um/include/asm/Kbuild
+++ b/arch/um/include/asm/Kbuild
@@ -23,7 +23,6 @@ generic-y += softirq_stack.h
generic-y += switch_to.h
generic-y += topology.h
generic-y += trace_clock.h
-generic-y += word-at-a-time.h
generic-y += kprobes.h
generic-y += mm_hooks.h
generic-y += vga.h
diff --git a/arch/x86/lib/csum-partial_64.c b/arch/x86/lib/csum-partial_64.c
index 1f8a8f895173..50734a23034c 100644
--- a/arch/x86/lib/csum-partial_64.c
+++ b/arch/x86/lib/csum-partial_64.c
@@ -93,7 +93,6 @@ __wsum csum_partial(const void *buff, int len, __wsum sum)
buff += 8;
}
if (len & 7) {
-#ifdef CONFIG_DCACHE_WORD_ACCESS
unsigned int shift = (8 - (len & 7)) * 8;
unsigned long trail;
@@ -103,31 +102,6 @@ __wsum csum_partial(const void *buff, int len, __wsum sum)
"adcq $0,%[res]"
: [res] "+r" (temp64)
: [trail] "r" (trail));
-#else
- if (len & 4) {
- asm("addq %[val],%[res]\n\t"
- "adcq $0,%[res]"
- : [res] "+r" (temp64)
- : [val] "r" ((u64)*(u32 *)buff)
- : "memory");
- buff += 4;
- }
- if (len & 2) {
- asm("addq %[val],%[res]\n\t"
- "adcq $0,%[res]"
- : [res] "+r" (temp64)
- : [val] "r" ((u64)*(u16 *)buff)
- : "memory");
- buff += 2;
- }
- if (len & 1) {
- asm("addq %[val],%[res]\n\t"
- "adcq $0,%[res]"
- : [res] "+r" (temp64)
- : [val] "r" ((u64)*(u8 *)buff)
- : "memory");
- }
-#endif
}
result = add32_with_carry(temp64 >> 32, temp64 & 0xffffffff);
if (unlikely(odd)) {
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index 40d6a06e41c8..4eb47d3ba625 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -8,6 +8,7 @@ endmenu
config UML_X86
def_bool y
+ select DCACHE_WORD_ACCESS
config 64BIT
bool "64-bit kernel" if "$(SUBARCH)" = "x86"