mirror of https://gitee.com/openkylin/linux.git
[PATCH] xtensa: remove verify_area macros
verify_area() is still alive on xtensa in 2.6.17-rc3-git13 It would be nice to finally be rid of that function across the board. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jesper Juhl
Linus Torvalds
parent
6f36d17a87
commit
b9e122c80c
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@ -34,10 +34,6 @@ config GENERIC_HARDIRQS
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bool
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default y
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config RWSEM_GENERIC_SPINLOCK
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bool
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default y
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source "init/Kconfig"
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menu "Processor type and features"
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@ -1102,7 +1102,7 @@ ENTRY(fast_syscall_sysxtensa)
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s32i a7, a2, PT_AREG7
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movi a7, 4 # sizeof(unsigned int)
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verify_area a3, a7, a0, a2, .Leac
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access_ok a0, a3, a7, a2, .Leac
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_beqi a6, SYSXTENSA_ATOMIC_SET, .Lset
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_beqi a6, SYSXTENSA_ATOMIC_EXG_ADD, .Lexg
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@ -104,7 +104,7 @@ sys_sigaction(int sig, const struct old_sigaction *act,
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if (act) {
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old_sigset_t mask;
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if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
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if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
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__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
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__get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
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return -EFAULT;
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@ -116,7 +116,7 @@ sys_sigaction(int sig, const struct old_sigaction *act,
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ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
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if (!ret && oact) {
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if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
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if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
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__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
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__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
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return -EFAULT;
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@ -236,7 +236,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
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err |= __copy_from_user (regs->areg, sc->sc_areg, XCHAL_NUM_AREGS*4);
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err |= __get_user(buf, &sc->sc_cpstate);
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if (buf) {
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if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
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if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
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goto badframe;
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err |= restore_cpextra(buf);
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}
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@ -357,7 +357,7 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
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if (regs->depc > 64)
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panic ("Double exception sys_sigreturn\n");
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if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
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if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
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goto badframe;
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if (__get_user(set.sig[0], &frame->sc.oldmask)
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@ -394,7 +394,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
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return 0;
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}
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if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
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if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
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goto badframe;
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if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
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@ -43,8 +43,7 @@ asmlinkage unsigned int csum_partial_copy_generic( const char *src, char *dst, i
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* Note: when you get a NULL pointer exception here this means someone
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* passed in an incorrect kernel address to one of these functions.
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*
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* If you use these functions directly please don't forget the
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* verify_area().
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* If you use these functions directly please don't forget the access_ok().
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*/
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static inline
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unsigned int csum_partial_copy_nocheck ( const char *src, char *dst,
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@ -172,4 +172,9 @@ static inline int rwsem_atomic_update(int delta, struct rw_semaphore *sem)
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return atomic_add_return(delta, (atomic_t *)(&sem->count));
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}
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#endif /* _XTENSA_RWSEM_XADD_H */
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static inline int rwsem_is_locked(struct rw_semaphore *sem)
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{
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return (sem->count != 0);
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}
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#endif /* _XTENSA_RWSEM_H */
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@ -154,35 +154,6 @@
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.Laccess_ok_\@:
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.endm
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/*
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* verify_area determines whether a memory access is allowed. It's
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* mostly an unnecessary wrapper for access_ok, but we provide it as a
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* duplicate of the verify_area() C inline function below. See the
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* equivalent C version below for clarity.
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*
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* On error, verify_area branches to a label indicated by parameter
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* <error>. This implies that the macro falls through to the next
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* instruction on success.
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*
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* Note that we assume success is the common case, and we optimize the
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* branch fall-through case on success.
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*
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* On Entry:
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* <aa> register containing memory address
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* <as> register containing memory size
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* <at> temp register
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* <error> label to branch to on error; implies fall-through
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* macro on success
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* On Exit:
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* <aa> preserved
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* <as> preserved
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* <at> destroyed
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*/
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.macro verify_area aa, as, at, sp, error
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access_ok \at, \aa, \as, \sp, \error
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.endm
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#else /* __ASSEMBLY__ not defined */
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#include <linux/sched.h>
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@ -211,11 +182,6 @@
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#define __access_ok(addr,size) (__kernel_ok || __user_ok((addr),(size)))
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#define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
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static inline int verify_area(int type, const void * addr, unsigned long size)
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{
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return access_ok(type,addr,size) ? 0 : -EFAULT;
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}
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/*
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* These are the main single-value transfer routines. They
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* automatically use the right size if we just have the right pointer
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