Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux...

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, asm: Use a lower case name for the end macro in atomic64_386_32.S
  x86, asm: Refactor atomic64_386_32.S to support old binutils and be cleaner
  x86: Document __phys_reloc_hide() usage in __pa_symbol()
  x86, apic: Map the local apic when parsing the MP table.

diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h
index 625c3f0..8ca8283 100644 (file)
--- a/arch/x86/include/asm/page.h
+++ b/arch/x86/include/asm/page.h
@@ -37,6 +37,13 @@ static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
 #define __pa_nodebug(x)        __phys_addr_nodebug((unsigned long)(x))
 /* __pa_symbol should be used for C visible symbols.
    This seems to be the official gcc blessed way to do such arithmetic. */
+/*
+ * We need __phys_reloc_hide() here because gcc may assume that there is no
+ * overflow during __pa() calculation and can optimize it unexpectedly.
+ * Newer versions of gcc provide -fno-strict-overflow switch to handle this
+ * case properly. Once all supported versions of gcc understand it, we can
+ * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated)
+ */
 #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
 
 #define __va(x)                        ((void *)((unsigned long)(x)+PAGE_OFFSET))

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 980508c..e3b534c 100644 (file)
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1606,7 +1606,7 @@ void __init init_apic_mappings(void)
                 * acpi lapic path already maps that address in
                 * acpi_register_lapic_address()
                 */
-               if (!acpi_lapic)
+               if (!acpi_lapic && !smp_found_config)
                        set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
 
                apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n",

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index d86dbf7..d7b6f7f 100644 (file)
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -274,6 +274,18 @@ static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
 
 void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { }
 
+static void __init smp_register_lapic_address(unsigned long address)
+{
+       mp_lapic_addr = address;
+
+       set_fixmap_nocache(FIX_APIC_BASE, address);
+       if (boot_cpu_physical_apicid == -1U) {
+               boot_cpu_physical_apicid  = read_apic_id();
+               apic_version[boot_cpu_physical_apicid] =
+                        GET_APIC_VERSION(apic_read(APIC_LVR));
+       }
+}
+
 static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
 {
        char str[16];
@@ -295,6 +307,10 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
        if (early)
                return 1;
 
+       /* Initialize the lapic mapping */
+       if (!acpi_lapic)
+               smp_register_lapic_address(mpc->lapic);
+
        if (mpc->oemptr)
                x86_init.mpparse.smp_read_mpc_oem(mpc);
 

diff --git a/arch/x86/lib/atomic64_386_32.S b/arch/x86/lib/atomic64_386_32.S
index 4a5979a..2cda60a 100644 (file)
--- a/arch/x86/lib/atomic64_386_32.S
+++ b/arch/x86/lib/atomic64_386_32.S
@@ -25,150 +25,172 @@
        CFI_ADJUST_CFA_OFFSET -4
 .endm
 
-.macro BEGIN func reg
-$v = \reg
-
-ENTRY(atomic64_\func\()_386)
-       CFI_STARTPROC
-       LOCK $v
-
-.macro RETURN
-       UNLOCK $v
+#define BEGIN(op) \
+.macro endp; \
+       CFI_ENDPROC; \
+ENDPROC(atomic64_##op##_386); \
+.purgem endp; \
+.endm; \
+ENTRY(atomic64_##op##_386); \
+       CFI_STARTPROC; \
+       LOCK v;
+
+#define ENDP endp
+
+#define RET \
+       UNLOCK v; \
        ret
-.endm
-
-.macro END_
-       CFI_ENDPROC
-ENDPROC(atomic64_\func\()_386)
-.purgem RETURN
-.purgem END_
-.purgem END
-.endm
-
-.macro END
-RETURN
-END_
-.endm
-.endm
 
-BEGIN read %ecx
-       movl  ($v), %eax
-       movl 4($v), %edx
-END
-
-BEGIN set %esi
-       movl %ebx,  ($v)
-       movl %ecx, 4($v)
-END
-
-BEGIN xchg %esi
-       movl  ($v), %eax
-       movl 4($v), %edx
-       movl %ebx,  ($v)
-       movl %ecx, 4($v)
-END
-
-BEGIN add %ecx
-       addl %eax,  ($v)
-       adcl %edx, 4($v)
-END
-
-BEGIN add_return %ecx
-       addl  ($v), %eax
-       adcl 4($v), %edx
-       movl %eax,  ($v)
-       movl %edx, 4($v)
-END
-
-BEGIN sub %ecx
-       subl %eax,  ($v)
-       sbbl %edx, 4($v)
-END
-
-BEGIN sub_return %ecx
+#define RET_ENDP \
+       RET; \
+       ENDP
+
+#define v %ecx
+BEGIN(read)
+       movl  (v), %eax
+       movl 4(v), %edx
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(set)
+       movl %ebx,  (v)
+       movl %ecx, 4(v)
+RET_ENDP
+#undef v
+
+#define v  %esi
+BEGIN(xchg)
+       movl  (v), %eax
+       movl 4(v), %edx
+       movl %ebx,  (v)
+       movl %ecx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(add)
+       addl %eax,  (v)
+       adcl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(add_return)
+       addl  (v), %eax
+       adcl 4(v), %edx
+       movl %eax,  (v)
+       movl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(sub)
+       subl %eax,  (v)
+       sbbl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(sub_return)
        negl %edx
        negl %eax
        sbbl $0, %edx
-       addl  ($v), %eax
-       adcl 4($v), %edx
-       movl %eax,  ($v)
-       movl %edx, 4($v)
-END
-
-BEGIN inc %esi
-       addl $1,  ($v)
-       adcl $0, 4($v)
-END
-
-BEGIN inc_return %esi
-       movl  ($v), %eax
-       movl 4($v), %edx
+       addl  (v), %eax
+       adcl 4(v), %edx
+       movl %eax,  (v)
+       movl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(inc)
+       addl $1,  (v)
+       adcl $0, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(inc_return)
+       movl  (v), %eax
+       movl 4(v), %edx
        addl $1, %eax
        adcl $0, %edx
-       movl %eax,  ($v)
-       movl %edx, 4($v)
-END
-
-BEGIN dec %esi
-       subl $1,  ($v)
-       sbbl $0, 4($v)
-END
-
-BEGIN dec_return %esi
-       movl  ($v), %eax
-       movl 4($v), %edx
+       movl %eax,  (v)
+       movl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(dec)
+       subl $1,  (v)
+       sbbl $0, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(dec_return)
+       movl  (v), %eax
+       movl 4(v), %edx
        subl $1, %eax
        sbbl $0, %edx
-       movl %eax,  ($v)
-       movl %edx, 4($v)
-END
+       movl %eax,  (v)
+       movl %edx, 4(v)
+RET_ENDP
+#undef v
 
-BEGIN add_unless %ecx
+#define v %ecx
+BEGIN(add_unless)
        addl %eax, %esi
        adcl %edx, %edi
-       addl  ($v), %eax
-       adcl 4($v), %edx
+       addl  (v), %eax
+       adcl 4(v), %edx
        cmpl %eax, %esi
        je 3f
 1:
-       movl %eax,  ($v)
-       movl %edx, 4($v)
+       movl %eax,  (v)
+       movl %edx, 4(v)
        movl $1, %eax
 2:
-RETURN
+       RET
 3:
        cmpl %edx, %edi
        jne 1b
        xorl %eax, %eax
        jmp 2b
-END_
+ENDP
+#undef v
 
-BEGIN inc_not_zero %esi
-       movl  ($v), %eax
-       movl 4($v), %edx
+#define v %esi
+BEGIN(inc_not_zero)
+       movl  (v), %eax
+       movl 4(v), %edx
        testl %eax, %eax
        je 3f
 1:
        addl $1, %eax
        adcl $0, %edx
-       movl %eax,  ($v)
-       movl %edx, 4($v)
+       movl %eax,  (v)
+       movl %edx, 4(v)
        movl $1, %eax
 2:
-RETURN
+       RET
 3:
        testl %edx, %edx
        jne 1b
        jmp 2b
-END_
+ENDP
+#undef v
 
-BEGIN dec_if_positive %esi
-       movl  ($v), %eax
-       movl 4($v), %edx
+#define v %esi
+BEGIN(dec_if_positive)
+       movl  (v), %eax
+       movl 4(v), %edx
        subl $1, %eax
        sbbl $0, %edx
        js 1f
-       movl %eax,  ($v)
-       movl %edx, 4($v)
+       movl %eax,  (v)
+       movl %edx, 4(v)
 1:
-END
+RET_ENDP
+#undef v