search for: b1babb4

...f (err && p->thread.io_bitmap_ptr) { - kfree(p->thread.io_bitmap_ptr); - p->thread.io_bitmap_max = 0; + if(err) + return err; } - return err; + + return copy_io_bitmap(tsk, p); } void diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 3ed4a68..b1babb4 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -50,6 +50,8 @@ #include <asm/debugreg.h> #include <asm/switch_to.h> +#include "process-io.h" + asmlinkage extern void ret_from_fork(void); __visible DEFINE_PER_CPU(unsigned long, old_rsp);...

...f (err && p->thread.io_bitmap_ptr) { - kfree(p->thread.io_bitmap_ptr); - p->thread.io_bitmap_max = 0; + if(err) + return err; } - return err; + + return copy_io_bitmap(tsk, p); } void diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 3ed4a68..b1babb4 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -50,6 +50,8 @@ #include <asm/debugreg.h> #include <asm/switch_to.h> +#include "process-io.h" + asmlinkage extern void ret_from_fork(void); __visible DEFINE_PER_CPU(unsigned long, old_rsp);...

This patch series makes it possible to compile out the userspace IO system calls, iopl and ioperm. The first patch does some 32/64 unification in copy_thread to make subsequent changes easier. The second patch simplifies the complex calculation of the TSS segment limit, which also makes it easier to change in the last patch. Patches 3-9 introduce helpers to make it easier to compile out IO.

This patch series makes it possible to compile out the userspace IO system calls, iopl and ioperm. The first patch does some 32/64 unification in copy_thread to make subsequent changes easier. The second patch simplifies the complex calculation of the TSS segment limit, which also makes it easier to change in the last patch. Patches 3-9 introduce helpers to make it easier to compile out IO.

...= next->iopl)) > - set_iopl_mask(next->iopl); > + switch_iopl_mask(prev, next); > > /* > * If it were not for PREEMPT_ACTIVE we could guarantee that the > diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c > index b1babb4..d18f3fc 100644 > --- a/arch/x86/kernel/process_64.c > +++ b/arch/x86/kernel/process_64.c > @@ -164,7 +164,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, > p->thread.sp = (unsigned long) childregs; > p->thread.usersp = me->thread.usersp; &g...

...- */ - if (get_kernel_rpl() && unlikely(prev->iopl != next->iopl)) - set_iopl_mask(next->iopl); + switch_iopl_mask(prev, next); /* * If it were not for PREEMPT_ACTIVE we could guarantee that the diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index b1babb4..d18f3fc 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -164,7 +164,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.sp = (unsigned long) childregs; p->thread.usersp = me->thread.usersp; set_tsk_thread_flag(p, TIF_FORK); - p...

...- */ - if (get_kernel_rpl() && unlikely(prev->iopl != next->iopl)) - set_iopl_mask(next->iopl); + switch_iopl_mask(prev, next); /* * If it were not for PREEMPT_ACTIVE we could guarantee that the diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index b1babb4..d18f3fc 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -164,7 +164,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.sp = (unsigned long) childregs; p->thread.usersp = me->thread.usersp; set_tsk_thread_flag(p, TIF_FORK); - p...