Author: kib Date: Tue Sep 22 16:29:55 2015 New Revision: 288115 URL: https://svnweb.freebsd.org/changeset/base/288115
Log: Re-check for new ast after ast was handled. We should not return to usermode with pending asts. Reviewed by: andrew Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D3667 Modified: head/sys/arm64/arm64/exception.S Modified: head/sys/arm64/arm64/exception.S ============================================================================== --- head/sys/arm64/arm64/exception.S Tue Sep 22 15:57:26 2015 (r288114) +++ head/sys/arm64/arm64/exception.S Tue Sep 22 16:29:55 2015 (r288115) @@ -100,10 +100,11 @@ __FBSDID("$FreeBSD$"); .macro do_ast /* Disable interrupts */ mrs x19, daif +1: msr daifset, #2 /* Read the current thread flags */ -1: ldr x1, [x18, #PC_CURTHREAD] /* Load curthread */ + ldr x1, [x18, #PC_CURTHREAD] /* Load curthread */ ldr x2, [x1, #TD_FLAGS] /* Check if we have either bits set */ @@ -120,9 +121,8 @@ __FBSDID("$FreeBSD$"); mov x0, sp bl _C_LABEL(ast) - /* Disable interrupts */ - mrs x19, daif - msr daifset, #2 + /* Re-check for new ast scheduled */ + b 1b 2: /* Restore interrupts */ _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
