Re: [PATCH] Documentation: Mention why %p prints ptrval

[Jonathan Corbet]

On Thu, 22 Mar 2018 15:53:36 +1030
Joel Stanley  wrote:

> When debugging recent kernels, people will see '(ptrval)' but there
> isn't much information as to what that means. Briefly describe why it's
> there.

Applied, thanks.

jon
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Re: [PATCH] Documentation: Mention why %p prints ptrval

[Tobin C . Harding]

On Thu, Mar 22, 2018 at 03:53:36PM +1030, Joel Stanley wrote:
> When debugging recent kernels, people will see '(ptrval)' but there
> isn't much information as to what that means. Briefly describe why it's
> there.
> 
> Signed-off-by: Joel Stanley 
> ---
>  Documentation/core-api/printk-formats.rst | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/core-api/printk-formats.rst 
> b/Documentation/core-api/printk-formats.rst
> index 934559b3c130..eb30efdd2e78 100644
> --- a/Documentation/core-api/printk-formats.rst
> +++ b/Documentation/core-api/printk-formats.rst
> @@ -60,8 +60,8 @@ Plain Pointers
>  Pointers printed without a specifier extension (i.e unadorned %p) are
>  hashed to prevent leaking information about the kernel memory layout. This
>  has the added benefit of providing a unique identifier. On 64-bit machines
> -the first 32 bits are zeroed. If you *really* want the address see %px
> -below.
> +the first 32 bits are zeroed. The kernel will print ``(ptrval)`` until it
> +gathers enough entropy. If you *really* want the address see %px below.

Acked-by: Tobin C. Harding 

thanks,
Tobin.
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[PATCH] Documentation: Mention why %p prints ptrval

[Joel Stanley]

When debugging recent kernels, people will see '(ptrval)' but there
isn't much information as to what that means. Briefly describe why it's
there.

Signed-off-by: Joel Stanley 
---
 Documentation/core-api/printk-formats.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/core-api/printk-formats.rst 
b/Documentation/core-api/printk-formats.rst
index 934559b3c130..eb30efdd2e78 100644
--- a/Documentation/core-api/printk-formats.rst
+++ b/Documentation/core-api/printk-formats.rst
@@ -60,8 +60,8 @@ Plain Pointers
 Pointers printed without a specifier extension (i.e unadorned %p) are
 hashed to prevent leaking information about the kernel memory layout. This
 has the added benefit of providing a unique identifier. On 64-bit machines
-the first 32 bits are zeroed. If you *really* want the address see %px
-below.
+the first 32 bits are zeroed. The kernel will print ``(ptrval)`` until it
+gathers enough entropy. If you *really* want the address see %px below.
 
 Symbols/Function Pointers
 -
-- 
2.15.1

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