[Qemu-devel] [PATCH 2.2 v2 1/3] linux-user: Fix timer_create timer id return type

[Alexander Graf <agraf@suse.de>]

The linux syscall to create_timer really gets an s32* parameter to store
its timer id into, not an abi_ulong*. Remove the useless struct encapsulation
and directly write the 32bit value into memory.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 linux-user/syscall.c      | 5 +----
 linux-user/syscall_defs.h | 5 +----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index a175cc1..d012c71 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9579,7 +9579,6 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         /* args: clockid_t clockid, struct sigevent *sevp, timer_t *timerid */
 
         struct sigevent host_sevp = { {0}, }, *phost_sevp = NULL;
-        struct target_timer_t *ptarget_timer;
 
         int clkid = arg1;
         int timer_index = next_free_host_timer();
@@ -9601,11 +9600,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
             if (ret) {
                 phtimer = NULL;
             } else {
-                if (!lock_user_struct(VERIFY_WRITE, ptarget_timer, arg3, 1)) {
+                if (put_user(0xcafe0000 | timer_index, arg3, target_timer_t)) {
                     goto efault;
                 }
-                ptarget_timer->ptr = tswap32(0xcafe0000 | timer_index);
-                unlock_user_struct(ptarget_timer, arg3, 1);
             }
         }
         break;
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index c9e6323..ebb3be1 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -2564,10 +2564,7 @@ struct target_ucred {
 
 #endif
 
-
-struct target_timer_t {
-    abi_ulong ptr;
-};
+typedef int32_t target_timer_t;
 
 #define TARGET_SIGEV_MAX_SIZE 64
 
-- 
1.7.12.4