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arch: remove compat_alloc_user_space

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All users of compat_alloc_user_space() and copy_in_user() have been
removed from the kernel, only a few functions in sparc remain that can be
changed to calling arch_copy_in_user() instead.

Link: https://lkml.kernel.org/r/20210727144859.4150043-7-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arnd Bergmann
2021-09-08 15:18:29 -07:00
committed by Linus Torvalds
parent 59ab844eed
commit a7a08b275a
24 changed files with 12 additions and 333 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
arch/x86/include/asm/compat.h
View File

@@ -156,19 +156,6 @@ struct compat_shmid64_ds {
(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
#endif
static inline void __user *arch_compat_alloc_user_space(long len)
{
compat_uptr_t sp = task_pt_regs(current)->sp;
/*
* -128 for the x32 ABI redzone. For IA32, it is not strictly
* necessary, but not harmful.
*/
sp -= 128;
return (void __user *)round_down(sp - len, 16);
}
static inline bool in_x32_syscall(void)
{
#ifdef CONFIG_X86_X32_ABI