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Commit 0dd8486b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

do_sigaltstack: small cleanups 



The previous commit ("do_sigaltstack: avoid copying 'stack_t' as a
structure to user space") fixed a real bug.  This one just cleans up the
copy from user space to that gcc can generate better code for it (and so
that it looks the same as the later copy back to user space).

Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0083fc2c

kernel/signal.c

+6 −4
Original line number Diff line number Diff line
@@ -2464,10 +2464,12 @@ do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long s 
		int ss_flags;



		error = -EFAULT;

		if (!access_ok(VERIFY_READ, uss, sizeof(*uss))

		    || __get_user(ss_sp, &uss->ss_sp)

		    || __get_user(ss_flags, &uss->ss_flags)

		    || __get_user(ss_size, &uss->ss_size))

		if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))

			goto out;

		error = __get_user(ss_sp, &uss->ss_sp) |

			__get_user(ss_flags, &uss->ss_flags) |

			__get_user(ss_size, &uss->ss_size);

		if (error)

			goto out;



		error = -EPERM;