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| author | Oleg Nesterov <oleg@redhat.com> | 2013-03-24 18:24:37 +0100 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2013-04-04 13:57:04 +0200 |
| commit | ab0d805c7b9089f9a9b291f33ab95301d6604868 (patch) | |
| tree | 6162392a40c89694c9d9c39453df73e6430433d5 | |
| parent | 3c9eb54f71fed86b761a6da4ad3eedc9566ceb8d (diff) | |
| download | lwn-ab0d805c7b9089f9a9b291f33ab95301d6604868.tar.gz lwn-ab0d805c7b9089f9a9b291f33ab95301d6604868.zip | |
uprobes: Turn copy_opcode() into copy_from_page()
No functional changes. Rename copy_opcode() into copy_from_page() and
add the new "int len" argument to make it more more generic for the
new users.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Anton Arapov <anton@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
| -rw-r--r-- | kernel/events/uprobes.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index ca9012930ce7..850eb9eb179b 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -187,10 +187,10 @@ bool __weak is_trap_insn(uprobe_opcode_t *insn) return is_swbp_insn(insn); } -static void copy_opcode(struct page *page, unsigned long vaddr, uprobe_opcode_t *opcode) +static void copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len) { void *kaddr = kmap_atomic(page); - memcpy(opcode, kaddr + (vaddr & ~PAGE_MASK), UPROBE_SWBP_INSN_SIZE); + memcpy(dst, kaddr + (vaddr & ~PAGE_MASK), len); kunmap_atomic(kaddr); } @@ -208,7 +208,7 @@ static int verify_opcode(struct page *page, unsigned long vaddr, uprobe_opcode_t * is a trap variant; uprobes always wins over any other (gdb) * breakpoint. */ - copy_opcode(page, vaddr, &old_opcode); + copy_from_page(page, vaddr, &old_opcode, UPROBE_SWBP_INSN_SIZE); is_swbp = is_swbp_insn(&old_opcode); if (is_swbp_insn(new_opcode)) { @@ -1472,7 +1472,7 @@ static int is_trap_at_addr(struct mm_struct *mm, unsigned long vaddr) if (result < 0) return result; - copy_opcode(page, vaddr, &opcode); + copy_from_page(page, vaddr, &opcode, UPROBE_SWBP_INSN_SIZE); put_page(page); out: /* This needs to return true for any variant of the trap insn */ |