Re: [Qemu-devel] [PATCH] exec: Fix prototype of phys_mem_set_alloc and related functions

["Michael S. Tsirkin" <mst@redhat.com>]

On Sun, Sep 29, 2013 at 08:56:45PM +0200, Stefan Weil wrote:
> phys_mem_alloc and its assigned values qemu_anon_ram_alloc and
> legacy_s390_alloc must have identical argument lists.
> 
> legacy_s390_alloc uses the size parameter to call mmap, so size_t is
> good enough for all of them.
> 
> This patch fixes compiler errors on i686 Linux hosts:
> 
>   CC    alpha-softmmu/exec.o
> exec.c:752:51: error:
>  initialization from incompatible pointer type [-Werror]
> exec.c: In function 'qemu_ram_alloc_from_ptr':
> exec.c:1139:32: error:
>  comparison of distinct pointer types lacks a cast [-Werror]
> exec.c: In function 'qemu_ram_remap':
> exec.c:1283:21: error:
>  comparison of distinct pointer types lacks a cast [-Werror]
> 
> Signed-off-by: Stefan Weil <sw@weilnetz.de>

Fixes build on 32 build boxes.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Michael S. Tsirkin <mst@redhat.com>

Anthony could you apply this quickly?
Broken builds are annoying ...

> ---
>  exec.c                  |    4 ++--
>  include/exec/exec-all.h |    2 +-
>  target-s390x/kvm.c      |    4 ++--
>  3 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/exec.c b/exec.c
> index 26681ce..1a08115 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -749,14 +749,14 @@ static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
>                               uint16_t section);
>  static subpage_t *subpage_init(AddressSpace *as, hwaddr base);
>  
> -static void *(*phys_mem_alloc)(ram_addr_t size) = qemu_anon_ram_alloc;
> +static void *(*phys_mem_alloc)(size_t size) = qemu_anon_ram_alloc;
>  
>  /*
>   * Set a custom physical guest memory alloator.
>   * Accelerators with unusual needs may need this.  Hopefully, we can
>   * get rid of it eventually.
>   */
> -void phys_mem_set_alloc(void *(*alloc)(ram_addr_t))
> +void phys_mem_set_alloc(void *(*alloc)(size_t))
>  {
>      phys_mem_alloc = alloc;
>  }
> diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
> index 77242e2..50ecfd4 100644
> --- a/include/exec/exec-all.h
> +++ b/include/exec/exec-all.h
> @@ -368,7 +368,7 @@ static inline uintptr_t tcg_getra_ext(uintptr_t ra)
>  
>  #if !defined(CONFIG_USER_ONLY)
>  
> -void phys_mem_set_alloc(void *(*alloc)(ram_addr_t));
> +void phys_mem_set_alloc(void *(*alloc)(size_t));
>  
>  struct MemoryRegion *iotlb_to_region(hwaddr index);
>  bool io_mem_read(struct MemoryRegion *mr, hwaddr addr,
> diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
> index 4923e0a..d229bdf 100644
> --- a/target-s390x/kvm.c
> +++ b/target-s390x/kvm.c
> @@ -93,7 +93,7 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
>  
>  static int cap_sync_regs;
>  
> -static void *legacy_s390_alloc(ram_addr_t size);
> +static void *legacy_s390_alloc(size_t size);
>  
>  int kvm_arch_init(KVMState *s)
>  {
> @@ -325,7 +325,7 @@ int kvm_s390_get_registers_partial(CPUState *cs)
>   * to grow. We also have to use MAP parameters that avoid
>   * read-only mapping of guest pages.
>   */
> -static void *legacy_s390_alloc(ram_addr_t size)
> +static void *legacy_s390_alloc(size_t size)
>  {
>      void *mem;
>  
> -- 
> 1.7.10.4
>