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um: Remove dead usage of TIF_IA32

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This seems like a dead artifact since TIF_IA32 is not even defined as a
TI flag for UM.  Looking back in git history, it made sense in the old
days, but it is apparently not used since UM was split out of the x86
arch/.  It is also going away from the x86 tree soon.

Also, I think the variable clean up it performs is not needed as 64-bit
UML doesn't run 32-bit binaries as far as I can tell, and 32-bit UML
has 32-bit ulong.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Gabriel Krisman Bertazi 2020-10-04 01:04:36 -04:00 committed by Richard Weinberger
parent 9a10705b42
commit 4687615d2d
1 changed files with 1 additions and 12 deletions
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13
arch/x86/um/ptrace_64.c
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@ -52,14 +52,6 @@ static const int reg_offsets[] =
int putreg(struct task_struct *child, int regno, unsigned long value)
{
#ifdef TIF_IA32
/*
* Some code in the 64bit emulation may not be 64bit clean.
* Don't take any chances.
*/
if (test_tsk_thread_flag(child, TIF_IA32))
value &= 0xffffffff;
#endif
switch (regno) {
case R8:
case R9:
@ -137,10 +129,7 @@ int poke_user(struct task_struct *child, long addr, long data)
unsigned long getreg(struct task_struct *child, int regno)
{
unsigned long mask = ~0UL;
#ifdef TIF_IA32
if (test_tsk_thread_flag(child, TIF_IA32))
mask = 0xffffffff;
#endif
switch (regno) {
case R8:
case R9: