From 43ae286b7d4d8c4983bc263ef2e3cccc10dedb2b Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Tue, 4 Nov 2008 02:42:27 -0500 Subject: [PATCH] [ARM] fix a couple clear_user_highpage assembly constraints In all cases the kaddr is assigned an input register even though it is modified in the assembly code. Let's assign a new variable to the modified value and mark those inline asm with volatile otherwise they get optimized away because the output variable is otherwise not used. Also fix a few conversion errors in copypage-feroceon.c and copypage-v4mc.c. Signed-off-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/mm/copypage-feroceon.c | 12 ++++++------ arch/arm/mm/copypage-v3.c | 10 +++++----- arch/arm/mm/copypage-v4mc.c | 8 ++++---- arch/arm/mm/copypage-v4wb.c | 10 +++++----- arch/arm/mm/copypage-v4wt.c | 10 +++++----- arch/arm/mm/copypage-xsc3.c | 10 +++++----- arch/arm/mm/copypage-xscale.c | 8 ++++---- 7 files changed, 34 insertions(+), 34 deletions(-) diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c index c3651b2939c..c3ba6a94da0 100644 --- a/arch/arm/mm/copypage-feroceon.c +++ b/arch/arm/mm/copypage-feroceon.c @@ -81,9 +81,9 @@ void feroceon_copy_user_highpage(struct page *to, struct page *from, void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr) { - void *kaddr = kmap_atomic(page, KM_USER0); - asm("\ - mov r1, %1 \n\ + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); + asm volatile ("\ + mov r1, %2 \n\ mov r2, #0 \n\ mov r3, #0 \n\ mov r4, #0 \n\ @@ -95,11 +95,11 @@ void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr) 1: stmia %0, {r2-r7, ip, lr} \n\ subs r1, r1, #1 \n\ mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\ - add r0, r0, #32 \n\ + add %0, %0, #32 \n\ bne 1b \n\ mcr p15, 0, r1, c7, c10, 4 @ drain WB" - : - : "r" (kaddr), "I" (PAGE_SIZE / 32) + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 32) : "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr"); kunmap_atomic(kaddr, KM_USER0); } diff --git a/arch/arm/mm/copypage-v3.c b/arch/arm/mm/copypage-v3.c index 13ce0baa6ba..70ed96c8af8 100644 --- a/arch/arm/mm/copypage-v3.c +++ b/arch/arm/mm/copypage-v3.c @@ -56,9 +56,9 @@ void v3_copy_user_highpage(struct page *to, struct page *from, */ void v3_clear_user_highpage(struct page *page, unsigned long vaddr) { - void *kaddr = kmap_atomic(page, KM_USER0); - asm("\n\ - mov r1, %1 @ 1\n\ + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); + asm volatile("\n\ + mov r1, %2 @ 1\n\ mov r2, #0 @ 1\n\ mov r3, #0 @ 1\n\ mov ip, #0 @ 1\n\ @@ -69,8 +69,8 @@ void v3_clear_user_highpage(struct page *page, unsigned long vaddr) stmia %0!, {r2, r3, ip, lr} @ 4\n\ subs r1, r1, #1 @ 1\n\ bne 1b @ 1" - : - : "r" (kaddr), "I" (PAGE_SIZE / 64) + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 64) : "r1", "r2", "r3", "ip", "lr"); kunmap_atomic(kaddr, KM_USER0); } diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c index a5eae503a34..bdb5fd983b1 100644 --- a/arch/arm/mm/copypage-v4mc.c +++ b/arch/arm/mm/copypage-v4mc.c @@ -93,9 +93,9 @@ void v4_mc_copy_user_highpage(struct page *from, struct page *to, */ void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr) { - void *kaddr = kmap_atomic(page, KM_USER0); + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); asm volatile("\ - mov r1, %0 @ 1\n\ + mov r1, %2 @ 1\n\ mov r2, #0 @ 1\n\ mov r3, #0 @ 1\n\ mov ip, #0 @ 1\n\ @@ -108,8 +108,8 @@ void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr) stmia %0!, {r2, r3, ip, lr} @ 4\n\ subs r1, r1, #1 @ 1\n\ bne 1b @ 1" - : - : "r" (kaddr), "I" (PAGE_SIZE / 64) + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 64) : "r1", "r2", "r3", "ip", "lr"); kunmap_atomic(kaddr, KM_USER0); } diff --git a/arch/arm/mm/copypage-v4wb.c b/arch/arm/mm/copypage-v4wb.c index 9144a96037b..3ec93dab765 100644 --- a/arch/arm/mm/copypage-v4wb.c +++ b/arch/arm/mm/copypage-v4wb.c @@ -66,9 +66,9 @@ void v4wb_copy_user_highpage(struct page *to, struct page *from, */ void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr) { - void *kaddr = kmap_atomic(page, KM_USER0); - asm("\ - mov r1, %1 @ 1\n\ + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); + asm volatile("\ + mov r1, %2 @ 1\n\ mov r2, #0 @ 1\n\ mov r3, #0 @ 1\n\ mov ip, #0 @ 1\n\ @@ -82,8 +82,8 @@ void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr) subs r1, r1, #1 @ 1\n\ bne 1b @ 1\n\ mcr p15, 0, r1, c7, c10, 4 @ 1 drain WB" - : - : "r" (kaddr), "I" (PAGE_SIZE / 64) + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 64) : "r1", "r2", "r3", "ip", "lr"); kunmap_atomic(kaddr, KM_USER0); } diff --git a/arch/arm/mm/copypage-v4wt.c b/arch/arm/mm/copypage-v4wt.c index b8a345d6e77..0f1188efae4 100644 --- a/arch/arm/mm/copypage-v4wt.c +++ b/arch/arm/mm/copypage-v4wt.c @@ -62,9 +62,9 @@ void v4wt_copy_user_highpage(struct page *to, struct page *from, */ void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr) { - void *kaddr = kmap_atomic(page, KM_USER0); - asm("\ - mov r1, %1 @ 1\n\ + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); + asm volatile("\ + mov r1, %2 @ 1\n\ mov r2, #0 @ 1\n\ mov r3, #0 @ 1\n\ mov ip, #0 @ 1\n\ @@ -76,8 +76,8 @@ void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr) subs r1, r1, #1 @ 1\n\ bne 1b @ 1\n\ mcr p15, 0, r2, c7, c7, 0 @ flush ID cache" - : - : "r" (kaddr), "I" (PAGE_SIZE / 64) + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 64) : "r1", "r2", "r3", "ip", "lr"); kunmap_atomic(kaddr, KM_USER0); } diff --git a/arch/arm/mm/copypage-xsc3.c b/arch/arm/mm/copypage-xsc3.c index 0e7cb325ca4..39a994542ca 100644 --- a/arch/arm/mm/copypage-xsc3.c +++ b/arch/arm/mm/copypage-xsc3.c @@ -89,9 +89,9 @@ void xsc3_mc_copy_user_highpage(struct page *to, struct page *from, */ void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr) { - void *kaddr = kmap_atomic(page, KM_USER0); - asm("\ - mov r1, %1 \n\ + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); + asm volatile ("\ + mov r1, %2 \n\ mov r2, #0 \n\ mov r3, #0 \n\ 1: mcr p15, 0, %0, c7, c6, 1 @ invalidate line\n\ @@ -101,8 +101,8 @@ void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr) strd r2, [%0], #8 \n\ subs r1, r1, #1 \n\ bne 1b" - : - : "r" (kaddr), "I" (PAGE_SIZE / 32) + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 32) : "r1", "r2", "r3"); kunmap_atomic(kaddr, KM_USER0); } diff --git a/arch/arm/mm/copypage-xscale.c b/arch/arm/mm/copypage-xscale.c index aa9f2ff9dce..d18f2397ee2 100644 --- a/arch/arm/mm/copypage-xscale.c +++ b/arch/arm/mm/copypage-xscale.c @@ -116,9 +116,9 @@ void xscale_mc_copy_user_highpage(struct page *to, struct page *from, void xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr) { - void *kaddr = kmap_atomic(page, KM_USER0); + void *ptr, *kaddr = kmap_atomic(page, KM_USER0); asm volatile( - "mov r1, %1 \n\ + "mov r1, %2 \n\ mov r2, #0 \n\ mov r3, #0 \n\ 1: mov ip, %0 \n\ @@ -130,8 +130,8 @@ xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr) subs r1, r1, #1 \n\ mcr p15, 0, ip, c7, c6, 1 @ invalidate D line\n\ bne 1b" - : - : "r" (kaddr), "I" (PAGE_SIZE / 32) + : "=r" (ptr) + : "0" (kaddr), "I" (PAGE_SIZE / 32) : "r1", "r2", "r3", "ip"); kunmap_atomic(kaddr, KM_USER0); } -- 2.41.1