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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-11-11 23:03:21 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-11-16 11:24:02 +0100 |
| commit | 577d5cd7e5851d3832066cd0422475fa7db2ee17 (patch) | |
| tree | 1de44238f0b2b0db2cb4778fc374f73cb8fe69f2 /arch/x86/kernel/ptrace.c | |
| parent | f5848e5fd2f813c3a8009a642dfbcf635287c199 (diff) | |
| download | linux-stable-577d5cd7e5851d3832066cd0422475fa7db2ee17.tar.gz linux-stable-577d5cd7e5851d3832066cd0422475fa7db2ee17.tar.bz2 linux-stable-577d5cd7e5851d3832066cd0422475fa7db2ee17.zip | |
x86/ioperm: Move iobitmap data into a struct
No point in having all the data in thread_struct, especially as upcoming
changes add more.
Make the bitmap in the new struct accessible as array of longs and as array
of characters via a union, so both the bitmap functions and the update
logic can avoid type casts.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/ptrace.c')
| -rw-r--r-- | arch/x86/kernel/ptrace.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index 7c526741215b..066e5b01a7e0 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -42,6 +42,7 @@ #include <asm/traps.h> #include <asm/syscall.h> #include <asm/fsgsbase.h> +#include <asm/io_bitmap.h> #include "tls.h" @@ -697,7 +698,9 @@ static int ptrace_set_debugreg(struct task_struct *tsk, int n, static int ioperm_active(struct task_struct *target, const struct user_regset *regset) { - return DIV_ROUND_UP(target->thread.io_bitmap_max, regset->size); + struct io_bitmap *iobm = target->thread.io_bitmap; + + return iobm ? DIV_ROUND_UP(iobm->max, regset->size) : 0; } static int ioperm_get(struct task_struct *target, @@ -705,12 +708,13 @@ static int ioperm_get(struct task_struct *target, unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) { - if (!target->thread.io_bitmap_ptr) + struct io_bitmap *iobm = target->thread.io_bitmap; + + if (!iobm) return -ENXIO; return user_regset_copyout(&pos, &count, &kbuf, &ubuf, - target->thread.io_bitmap_ptr, - 0, IO_BITMAP_BYTES); + iobm->bitmap, 0, IO_BITMAP_BYTES); } /* |