Re: [PATCH/RFC 6/7] arm64: Replace ACCESS_ONCE for spinlock code with barriers

Am 24.11.2014 um 14:03 schrieb Christian Borntraeger: > ACCESS_ONCE does not work reliably on non-scalar types. For > example gcc 4.6 and 4.7 might remove the volatile tag for such > accesses during the SRA (scalar replacement of aggregates) step >

[PATCH/RFC 6/7] arm64: Replace ACCESS_ONCE for spinlock code with barriers

ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the spinlock code to access the lock with a

[PATCH/RFC 6/7] arm64: Replace ACCESS_ONCE for spinlock code with barriers

ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145) Change the spinlock code to access the lock with a

Re: [PATCH/RFC 6/7] arm64: Replace ACCESS_ONCE for spinlock code with barriers

Am 24.11.2014 um 14:03 schrieb Christian Borntraeger: ACCESS_ONCE does not work reliably on non-scalar types. For example gcc 4.6 and 4.7 might remove the volatile tag for such accesses during the SRA (scalar replacement of aggregates) step (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145)