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hexagon: switch to copy_thread_tls()

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Use the copy_thread_tls() calling convention which passes tls through a
register. This is required so we can remove the copy_thread{_tls}() split
and remove the HAVE_COPY_THREAD_TLS macro.

Cc: linux-hexagon@vger.kernel.org
Acked-by: Brian Cain <bcain@codeaurora.org>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2020-05-24 23:15:53 +02:00
parent e0daa22c29
commit 643d48b8e6
No known key found for this signature in database
GPG key ID: 91C61BC06578DCA2
2 changed files with 4 additions and 3 deletions
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1
arch/hexagon/Kconfig
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@ -31,6 +31,7 @@ config HEXAGON
select GENERIC_CLOCKEVENTS_BROADCAST
select MODULES_USE_ELF_RELA
select GENERIC_CPU_DEVICES
select HAVE_COPY_THREAD_TLS
help
Qualcomm Hexagon is a processor architecture designed for high
performance and low power across a wide variety of applications.

6
arch/hexagon/kernel/process.c
View file

@ -50,8 +50,8 @@ void arch_cpu_idle(void)
/*
* Copy architecture-specific thread state
*/
int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long arg, struct task_struct *p)
int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
unsigned long arg, struct task_struct *p, unsigned long tls)
{
struct thread_info *ti = task_thread_info(p);
struct hexagon_switch_stack *ss;
@ -100,7 +100,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
* ugp is used to provide TLS support.
*/
if (clone_flags & CLONE_SETTLS)
childregs->ugp = childregs->r04;
childregs->ugp = tls;
/*
* Parent sees new pid -- not necessary, not even possible at