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    Subject[PATCH 11/19] change write_ldt_entry signature
    Date
    this patch changes the signature of write_ldt_entry.

    Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
    ---
    arch/x86/kernel/ldt.c | 3 +--
    arch/x86/xen/enlighten.c | 4 ++--
    include/asm-x86/desc_32.h | 9 ++++++++-
    include/asm-x86/desc_64.h | 7 ++-----
    include/asm-x86/paravirt.h | 10 ++++++----
    5 files changed, 19 insertions(+), 14 deletions(-)

    diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
    index 3e872b4..b8ef462 100644
    --- a/arch/x86/kernel/ldt.c
    +++ b/arch/x86/kernel/ldt.c
    @@ -229,8 +229,7 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)

    /* Install the new entry ... */
    install:
    - write_ldt_entry(mm->context.ldt, ldt_info.entry_number,
    - ldt.a, ldt.b);
    + write_ldt_entry(mm->context.ldt, ldt_info.entry_number, &ldt);
    error = 0;

    out_unlock:
    diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
    index a552103..16223b6 100644
    --- a/arch/x86/xen/enlighten.c
    +++ b/arch/x86/xen/enlighten.c
    @@ -357,11 +357,11 @@ static void xen_load_tls(struct thread_struct *t, unsigned int cpu)
    }

    static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
    - u32 low, u32 high)
    + void *ptr)
    {
    unsigned long lp = (unsigned long)&dt[entrynum];
    xmaddr_t mach_lp = virt_to_machine(lp);
    - u64 entry = (u64)high << 32 | low;
    + u64 entry = *(u64 *)ptr;

    preempt_disable();

    diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
    index 622b0e7..46fe80a 100644
    --- a/include/asm-x86/desc_32.h
    +++ b/include/asm-x86/desc_32.h
    @@ -68,12 +68,19 @@ static inline void pack_gate(gate_desc *gate,
    #define load_TLS(t, cpu) native_load_tls(t, cpu)
    #define set_ldt native_set_ldt

    -#define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b)
    +#define write_ldt_entry(dt, entry, desc) \
    + native_write_ldt_entry(dt, entry, desc)
    #define write_gdt_entry(dt, entry, desc, size) \
    native_write_gdt_entry(dt, entry, desc, size)
    #define write_idt_entry(dt, entry, g) native_write_idt_entry(dt, entry, g)
    #endif

    +static inline void native_write_ldt_entry(struct desc_struct *ldt, int entry,
    + void *desc)
    +{
    + memcpy(&ldt[entry], desc, size);
    +}
    +
    static inline void native_write_idt_entry(gate_desc *idt, int entry, gate_desc *gate)
    {
    memcpy(&idt[entry], gate, sizeof(*gate));
    diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
    index e0aa4bc..3cd5f10 100644
    --- a/include/asm-x86/desc_64.h
    +++ b/include/asm-x86/desc_64.h
    @@ -34,12 +34,9 @@ extern gate_desc idt_table[];
    extern struct desc_ptr cpu_gdt_descr[];

    static inline void write_ldt_entry(struct desc_struct *ldt,
    - int entry, u32 entry_low, u32 entry_high)
    + int entry, void *ptr)
    {
    - __u32 *lp = (__u32 *)((entry << 3) + (char *)ldt);
    -
    - lp[0] = entry_low;
    - lp[1] = entry_high;
    + memcpy(&ldt[entry], ptr, 8);
    }

    /* the cpu gdt accessor */
    diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
    index a3e22b7..b855264 100644
    --- a/include/asm-x86/paravirt.h
    +++ b/include/asm-x86/paravirt.h
    @@ -96,8 +96,8 @@ struct pv_cpu_ops {
    void (*set_ldt)(const void *desc, unsigned entries);
    unsigned long (*store_tr)(void);
    void (*load_tls)(struct thread_struct *t, unsigned int cpu);
    - void (*write_ldt_entry)(struct desc_struct *,
    - int entrynum, u32 low, u32 high);
    + void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
    + void *desc);
    void (*write_gdt_entry)(struct desc_struct *,
    int entrynum, void *desc, int size);
    void (*write_idt_entry)(gate_desc *,
    @@ -660,9 +660,11 @@ static inline void load_TLS(struct thread_struct *t, unsigned cpu)
    {
    PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
    }
    -static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high)
    +
    +static inline void write_ldt_entry(struct desc_struct *dt, int entry,
    + void *desc)
    {
    - PVOP_VCALL4(pv_cpu_ops.write_ldt_entry, dt, entry, low, high);
    + PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
    }

    static inline void write_gdt_entry(struct desc_struct *dt, int entry,
    --
    1.4.4.2


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