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| author | Michal Simek <monstr@monstr.eu> | 2010-06-22 16:29:05 (GMT) |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 08:45:12 (GMT) |
| commit | 25f6e59657211b3f7d912520c53fb7d98ebe960b (patch) | |
| tree | 375bf049e17ac3cb94fd894c1a727afd99915094 | |
| parent | 287503fabd9910cc77266142c7c8acbdb8efbf6b (diff) | |
| download | linux-25f6e59657211b3f7d912520c53fb7d98ebe960b.tar.xz | |
microblaze: Fix _user_exception function
Saving some instructions. Clear VMS bit if kernel comes
from kernel space.
Signed-off-by: Michal Simek <monstr@monstr.eu>
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index e7abf74..4c06e1a 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -352,6 +352,7 @@ C_ENTRY(_user_exception): swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */ lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); swi r11, r1, PTO+PT_R1; /* Store user SP. */ + clear_ums; 2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* Save away the syscall number. */ swi r12, r1, PTO+PT_R0; @@ -363,10 +364,8 @@ C_ENTRY(_user_exception): * register should point to the location where * the called function should return. [note that MAKE_SYS_CALL uses label 1] */ - # Step into virtual mode. - set_vms; - addik r11, r0, 3f - rtid r11, 0 + /* Step into virtual mode */ + rtbd r0, 3f nop 3: lwi r11, CURRENT_TASK, TS_THREAD_INFO /* get thread info */ |